Error parsing XML document

/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:57: parser error : Entity 'aelig' not defined
            <div><head>Arnamagn&aelig;anske
                                      ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:61: parser error : Entity 'aelig' not defined
                  arnamagn&aelig;anske s&oslash;sterinstituttene har
                                 ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:61: parser error : Entity 'oslash' not defined
                  arnamagn&aelig;anske s&oslash;sterinstituttene har
                                                ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:62: parser error : Entity 'oslash' not defined
                  den st&oslash;rste samlingen av norr&oslash;ne
                                ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:62: parser error : Entity 'oslash' not defined
                  den st&oslash;rste samlingen av norr&oslash;ne
                                                              ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:63: parser error : Entity 'aring' not defined
                  h&aring;ndskrifter i verden. Begge vedlikeholder
                          ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:67: parser error : Entity 'aelig' not defined
                  Arnamagn&aelig;anske
                                 ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:68: parser error : Entity 'oslash' not defined
                  Samling</ref>, K&oslash;benhavn</item>
                                          ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:69: parser error : Entity 'Aacute' not defined
                 <item><ref target="http://www.arnastofnun.is/">Stofnun &Aacute;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:69: parser error : Entity 'uacute' not defined
 <item><ref target="http://www.arnastofnun.is/">Stofnun &Aacute;rna Magn&uacute;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:69: parser error : Entity 'aacute' not defined
get="http://www.arnastofnun.is/">Stofnun &Aacute;rna Magn&uacute;ssonar &aacute;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:69: parser error : Entity 'Iacute' not defined
//www.arnastofnun.is/">Stofnun &Aacute;rna Magn&uacute;ssonar &aacute;  &Iacute;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:69: parser error : Entity 'iacute' not defined
n &Aacute;rna Magn&uacute;ssonar &aacute;  &Iacute;slandi</ref>, Reykjav&iacute;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:72: parser error : Entity 'aring' not defined
                  middelalderh&aring;ndskrifter finnes ogs&aring; i
                                     ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:72: parser error : Entity 'aring' not defined
                  middelalderh&aring;ndskrifter finnes ogs&aring; i
                                                                 ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:79: parser error : Entity 'aring' not defined
                  <p>S&aring; langt
                             ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:80: parser error : Entity 'aring' not defined
                  det er mulig, g&aring;r disse lenkene til
                                        ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:81: parser error : Entity 'aring' not defined
                  h&aring;ndskriftsavdelingene ved de enkelte
                          ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:86: parser error : Entity 'oslash' not defined
                     Kongelige Bibliotek</ref>, K&oslash;benhavn</item>
                                                         ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:89: parser error : Entity 'oacute' not defined
                  <item><ref target="http://www.bok.hi.is/">Landsb&oacute;kasafn
                                                                          ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:90: parser error : Entity 'iacute' not defined
                     Reykjav&iacute;k</item></list>
                                    ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:107: parser error : Entity 'ouml' not defined
           <item><ref target="http://www.ub.gu.se/samlingar/handskrift/">G&ouml;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:109: parser error : Entity 'ouml' not defined
                           G&ouml;teborg</item>
                                  ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:149: parser error : Entity 'auml' not defined
             <item><ref target="http://www.ub.uni-tuebingen.de/">Universit&auml;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:150: parser error : Entity 'uuml' not defined
                  T&uuml;bingen</ref>, T&uuml;bingen</item>
                         ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:150: parser error : Entity 'uuml' not defined
                  T&uuml;bingen</ref>, T&uuml;bingen</item>
                                              ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:153: parser error : Entity 'Oslash' not defined
               <list><head>&Oslash;sterrike</head>
                                   ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:155: parser error : Entity 'Ouml' not defined
   <item><ref target="http://www.onb.ac.at/sammlungen/hschrift/index.htm">&Ouml;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:160: parser error : Entity 'egrave' not defined
target="http://www.bnf.fr/pages/zNavigat/frame/collections.htm">Biblioth&egrave;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:192: parser error : Entity 'oslash' not defined
                  K&oslash;benhavn</item>
                           ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:198: parser error : Entity 'iacute' not defined
                  Reykjav&iacute;k / Itacha NY</item>
                                 ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:199: parser error : Entity 'aelig' not defined
ef target="http://www.arnastofnun.is/page/arnastofnun_hand_handrit">Stafr&aelig;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:201: parser error : Entity 'iacute' not defined
                  (digitaliserte faksimiler), Reykjav&iacute;k</item>
                                                             ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:211: parser error : Entity 'oslash' not defined
         <head>Ordb&oslash;ker og ordboksprosjekter</head>
                           ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:214: parser error : Entity 'oslash' not defined
                  ordb&oslash;kene er Fritzner og S&ouml;derwall
                              ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:214: parser error : Entity 'ouml' not defined
                  ordb&oslash;kene er Fritzner og S&ouml;derwall
                                                         ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:215: parser error : Entity 'oslash' not defined
                  fullt s&oslash;kbare, Kalkar i faksimile, og
                                 ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:216: parser error : Entity 'oslash' not defined
                  <title>Ordbog over det norr&oslash;ne prosasprog</title> i
                                                     ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:220: parser error : Entity 'oslash' not defined
                  over det norr&oslash;ne
                                       ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:222: parser error : Entity 'oslash' not defined
                  K&oslash;benhavn</item>
                           ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:225: parser error : Entity 'oslash' not defined
                  K&oslash;benhavn</item>
                           ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:226: parser error : Entity 'eth' not defined
                  <item><ref target="http://www.lexis.hi.is/">Or&eth;ab&oacute;k
                                                                     ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:226: parser error : Entity 'oacute' not defined
                  <item><ref target="http://www.lexis.hi.is/">Or&eth;ab&oacute;k
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:227: parser error : Entity 'aacute' not defined
                  H&aacute;sk&oacute;lans</ref>,
                           ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:227: parser error : Entity 'oacute' not defined
                  H&aacute;sk&oacute;lans</ref>,
                                     ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:228: parser error : Entity 'iacute' not defined
                  Reykjav&iacute;k</item>
                                 ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:234: parser error : Entity 'aelig' not defined
                  Kalkars ordbok til det &aelig;ldre danske
                                                ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:238: parser error : Entity 'ouml' not defined
                  S&ouml;derwalls Ordbok &ouml;fver Svenska
                         ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:238: parser error : Entity 'ouml' not defined
                  S&ouml;derwalls Ordbok &ouml;fver Svenska
                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:239: parser error : Entity 'aring' not defined
                  Medeltids-spr&aring;ket</ref>,
                                      ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:240: parser error : Entity 'ouml' not defined
                  G&ouml;teborg</item></list></div>
                         ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:246: parser error : Entity 'oslash' not defined
                  K&oslash;benhavn</item>
                           ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:250: parser error : Entity 'oslash' not defined
                  <item><ref target="http://www.lss.fo/">F&oslash;roya
                                                                  ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:252: parser error : Entity 'oacute' not defined
                  T&oacute;rshavn</item>
                           ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:253: parser error : Entity 'THORN' not defined
                  <item><ref target="http://www.archives.is">&THORN;j&oacute;&et
                                                                    ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:253: parser error : Entity 'oacute' not defined
                  <item><ref target="http://www.archives.is">&THORN;j&oacute;&et
                                                                             ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:253: parser error : Entity 'eth' not defined
                <item><ref target="http://www.archives.is">&THORN;j&oacute;&eth;
                                                                               ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:254: parser error : Entity 'Iacute' not defined
                  &Iacute;slands</ref>,
                          ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:255: parser error : Entity 'iacute' not defined
                  Reykjav&iacute;k</item>
                                 ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:267: parser error : Entity 'THORN' not defined
               <item><ref target="http://www.natmus.is/">&THORN;j&oacute;&eth;mi
                                                                ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:267: parser error : Entity 'oacute' not defined
               <item><ref target="http://www.natmus.is/">&THORN;j&oacute;&eth;mi
                                                                         ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:267: parser error : Entity 'eth' not defined
               <item><ref target="http://www.natmus.is/">&THORN;j&oacute;&eth;mi
                                                                              ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:268: parser error : Entity 'iacute' not defined
                  Reykjav&iacute;k</item>
                                 ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:269: parser error : Entity 'eth' not defined
               <item><ref target="http://www.akmus.is/">Minjasafni&eth;</ref>,
                                                                       ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:281: parser error : Entity 'Aacute' not defined
                  &Aacute;rna Magn&uacute;ssonar &aacute;
                          ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:281: parser error : Entity 'uacute' not defined
                  &Aacute;rna Magn&uacute;ssonar &aacute;
                                          ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:281: parser error : Entity 'aacute' not defined
                  &Aacute;rna Magn&uacute;ssonar &aacute;
                                                         ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:282: parser error : Entity 'Iacute' not defined
                  &Iacute;slandi</ref>,
                          ^
/mnt/stor/prosjekt/menota/public_html/lenker/lenker.page:283: parser error : Entity 'iacute' not defined
                  Reykjav&iacute;k</item>
                                 ^
 at /usr/lib/perl5/site_perl/Aksis/XSLTransformer/Application.pm line 154