{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,21]],"date-time":"2026-04-21T17:00:08Z","timestamp":1776790808928,"version":"3.51.2"},"reference-count":21,"publisher":"American Mathematical Society (AMS)","issue":"267","license":[{"start":{"date-parts":[[2009,10,24]],"date-time":"2009-10-24T00:00:00Z","timestamp":1256342400000},"content-version":"am","delay-in-days":365,"URL":"https:\/\/www.ams.org\/publications\/copyright-and-permissions"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Math. Comp."],"abstract":"<p>\n                    All\n                    <inline-formula content-type=\"math\/mathml\">\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" alttext=\"28\">\n                        <mml:semantics>\n                          <mml:mn>28<\/mml:mn>\n                          <mml:annotation encoding=\"application\/x-tex\">28<\/mml:annotation>\n                        <\/mml:semantics>\n                      <\/mml:math>\n                    <\/inline-formula>\n                    -dimensional unimodular lattices with minimum norm\n                    <inline-formula content-type=\"math\/mathml\">\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" alttext=\"3\">\n                        <mml:semantics>\n                          <mml:mn>3<\/mml:mn>\n                          <mml:annotation encoding=\"application\/x-tex\">3<\/mml:annotation>\n                        <\/mml:semantics>\n                      <\/mml:math>\n                    <\/inline-formula>\n                    are known. Using this classification, we give a classification of ternary extremal self-dual codes of length\n                    <inline-formula content-type=\"math\/mathml\">\n                      <mml:math xmlns:mml=\"http:\/\/www.w3.org\/1998\/Math\/MathML\" alttext=\"28\">\n                        <mml:semantics>\n                          <mml:mn>28<\/mml:mn>\n                          <mml:annotation encoding=\"application\/x-tex\">28<\/mml:annotation>\n                        <\/mml:semantics>\n                      <\/mml:math>\n                    <\/inline-formula>\n                    . Up to equivalence, there are 6,931 such codes.\n                  <\/p>","DOI":"10.1090\/s0025-5718-08-02194-7","type":"journal-article","created":{"date-parts":[[2009,4,27]],"date-time":"2009-04-27T13:47:33Z","timestamp":1240840053000},"page":"1787-1796","source":"Crossref","is-referenced-by-count":15,"title":["Classification of ternary extremal self-dual codes of length 28"],"prefix":"10.1090","volume":"78","author":[{"given":"Masaaki","family":"Harada","sequence":"first","affiliation":[]},{"given":"Akihiro","family":"Munemasa","sequence":"additional","affiliation":[]},{"given":"Boris","family":"Venkov","sequence":"additional","affiliation":[]}],"member":"14","published-online":{"date-parts":[[2008,10,24]]},"reference":[{"issue":"5","key":"1","doi-asserted-by":"publisher","first-page":"1163","DOI":"10.5802\/aif.1490","article-title":"Lattices and association schemes: a unimodular example without roots in dimension 28","volume":"45","author":"Bacher, R.","year":"1995","journal-title":"Ann. 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