{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T13:08:07Z","timestamp":1775567287227,"version":"3.50.1"},"reference-count":0,"publisher":"Walter de Gruyter GmbH","issue":"3-4","license":[{"start":{"date-parts":[[1973,4,1]],"date-time":"1973-04-01T00:00:00Z","timestamp":102470400000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1973,4,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>It is shown that the cluster expansion formalism previously developed as a basis for a theory of the ground state of correlated systems may be generalised in such a way as to enable the application of the generator coordinate method in the presence of singular interactions, thereby providing also a theory for excited states.<\/jats:p>","DOI":"10.1515\/zna-1973-3-411","type":"journal-article","created":{"date-parts":[[2019,9,24]],"date-time":"2019-09-24T13:42:06Z","timestamp":1569332526000},"page":"393-395","source":"Crossref","is-referenced-by-count":0,"title":["Generator Coordinate Method and Short Range Correlations"],"prefix":"10.1515","volume":"28","author":[{"given":"J. da","family":"Provid\u00eancia","sequence":"first","affiliation":[{"name":"Laborat\u00f3rio de F\u00edsica, Universidade de Coimbra, Portugal"}]},{"given":"C. M.","family":"Shakin","sequence":"additional","affiliation":[{"name":"Department of Physics, Case Western Reserve University, Cleveland, Ohio, 44106"}]}],"member":"374","published-online":{"date-parts":[[2014,6,2]]},"container-title":["Zeitschrift f\u00fcr Naturforschung A"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.degruyter.com\/view\/journals\/zna\/28\/3-4\/article-p393.xml","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.degruyterbrill.com\/document\/doi\/10.1515\/zna-1973-3-411\/xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.degruyterbrill.com\/document\/doi\/10.1515\/zna-1973-3-411\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,7]],"date-time":"2026-04-07T12:34:56Z","timestamp":1775565296000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.degruyterbrill.com\/document\/doi\/10.1515\/zna-1973-3-411\/html"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1973,4,1]]},"references-count":0,"journal-issue":{"issue":"3-4","published-online":{"date-parts":[[2014,6,2]]},"published-print":{"date-parts":[[1973,4,1]]}},"alternative-id":["10.1515\/zna-1973-3-411"],"URL":"https:\/\/doi.org\/10.1515\/zna-1973-3-411","relation":{},"ISSN":["1865-7109","0932-0784"],"issn-type":[{"value":"1865-7109","type":"electronic"},{"value":"0932-0784","type":"print"}],"subject":[],"published":{"date-parts":[[1973,4,1]]}}}