{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T16:24:24Z","timestamp":1776270264288,"version":"3.50.1"},"reference-count":10,"publisher":"Elsevier BV","issue":"1-3","license":[{"start":{"date-parts":[[1996,5,1]],"date-time":"1996-05-01T00:00:00Z","timestamp":830908800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2013,7,17]],"date-time":"2013-07-17T00:00:00Z","timestamp":1374019200000},"content-version":"vor","delay-in-days":6286,"URL":"https:\/\/www.elsevier.com\/open-access\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Discrete Applied Mathematics"],"published-print":{"date-parts":[[1996,5]]},"DOI":"10.1016\/0166-218x(95)00021-i","type":"journal-article","created":{"date-parts":[[2003,4,30]],"date-time":"2003-04-30T18:23:46Z","timestamp":1051727026000},"page":"221-228","source":"Crossref","is-referenced-by-count":4,"title":["Graph transformations which preserve the multiplicity of an eigenvalue"],"prefix":"10.1016","volume":"67","author":[{"given":"Yeh","family":"Yeong-Nan","sequence":"first","affiliation":[]},{"given":"Ivan","family":"Gutman","sequence":"additional","affiliation":[]},{"given":"Fu","family":"Chin-Mei","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/0166-218X(95)00021-I_BIB1","author":"Abramovitz","year":"1965"},{"key":"10.1016\/0166-218X(95)00021-I_BIB2","series-title":"Spectra of Graphs\u2014Theory and Application","author":"Cvetkovi\u0107","year":"1980"},{"key":"10.1016\/0166-218X(95)00021-I_BIB3","first-page":"141","article-title":"The algebraic multiplicity of the number zero in the spectrum of a bipartite graph","volume":"9","author":"Cvetkovi\u0107","year":"1972","journal-title":"Mat. Vesnik (Beograd)"},{"key":"10.1016\/0166-218X(95)00021-I_BIB4","first-page":"365","article-title":"Graph theory and molecular orbitals. II","volume":"44","author":"Cvetkovi\u0107","year":"1972","journal-title":"Croat. Chem. Acta"},{"key":"10.1016\/0166-218X(95)00021-I_BIB5","doi-asserted-by":"crossref","first-page":"289","DOI":"10.1016\/0022-2860(75)80099-8","article-title":"Graphical studies on the relations between the structure and reactivity of conjugated systems: The role of non-bonding molecular orbitals","volume":"28","author":"Cvetkovi\u0107","year":"1975","journal-title":"J. Mol. Struct."},{"key":"10.1016\/0166-218X(95)00021-I_BIB6","series-title":"Topological Approach to the Chemistry of Conjugated Molecules","author":"Graovac","year":"1977"},{"key":"10.1016\/0166-218X(95)00021-I_BIB7","first-page":"423","article-title":"Graph theory and molecular orbitals. IV. Further application of Sachs formula","volume":"45","author":"Gutman","year":"1973","journal-title":"Croat. Chem. Acta"},{"key":"10.1016\/0166-218X(95)00021-I_BIB8","first-page":"49","article-title":"Graph theory and molecular orbitals","volume":"42","author":"Gutman","year":"1973","journal-title":"Top. Curr. Chem."},{"key":"10.1016\/0166-218X(95)00021-I_BIB9","doi-asserted-by":"crossref","first-page":"307","DOI":"10.1016\/0166-1280(92)87021-Q","article-title":"Generalized H\u00fcckel-M\u00f6bius rule","volume":"259","author":"Klein","year":"1992","journal-title":"J. Mol. Struct. (Theochem)"},{"key":"10.1016\/0166-218X(95)00021-I_BIB10","series-title":"Chemical Graph Theory","author":"Trinajsti\u0107","year":"1983"}],"container-title":["Discrete Applied Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0166218X9500021I?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0166218X9500021I?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,24]],"date-time":"2019-04-24T14:27:19Z","timestamp":1556116039000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/0166218X9500021I"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1996,5]]},"references-count":10,"journal-issue":{"issue":"1-3","published-print":{"date-parts":[[1996,5]]}},"alternative-id":["0166218X9500021I"],"URL":"https:\/\/doi.org\/10.1016\/0166-218x(95)00021-i","relation":{},"ISSN":["0166-218X"],"issn-type":[{"value":"0166-218X","type":"print"}],"subject":[],"published":{"date-parts":[[1996,5]]}}}