{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T21:35:39Z","timestamp":1768512939210,"version":"3.49.0"},"reference-count":5,"publisher":"Elsevier BV","issue":"3","license":[{"start":{"date-parts":[[1980,9,1]],"date-time":"1980-09-01T00:00:00Z","timestamp":336614400000},"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":12007,"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":[[1980,9]]},"DOI":"10.1016\/0166-218x(80)90042-6","type":"journal-article","created":{"date-parts":[[2002,7,26]],"date-time":"2002-07-26T03:43:34Z","timestamp":1027655014000},"page":"225-231","source":"Crossref","is-referenced-by-count":17,"title":["Optimal K-secure graphs"],"prefix":"10.1016","volume":"2","author":[{"given":"G.","family":"Gunther","sequence":"first","affiliation":[]},{"given":"B.L.","family":"Hartnell","sequence":"additional","affiliation":[]}],"member":"78","reference":[{"key":"10.1016\/0166-218X(80)90042-6_BIB1","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1002\/net.3230020306","article-title":"A general class of invulnerable graphs","volume":"2","author":"Boesch","year":"1972","journal-title":"Networks"},{"issue":"2","key":"10.1016\/0166-218X(80)90042-6_BIB2","doi-asserted-by":"crossref","first-page":"418","DOI":"10.1137\/0132034","article-title":"On designing a reliable hierarchical structure","volume":"32","author":"Loodman","year":"1977","journal-title":"SIAM J. Appl. Math."},{"key":"10.1016\/0166-218X(80)90042-6_BIB3","article-title":"On minimizing the effects of betrayals in a resistance movement","author":"Gunther","year":"1978","journal-title":"Proc. Eighth Manitoba Conference on Numerical Mathematics and Computing"},{"key":"10.1016\/0166-218X(80)90042-6_BIB4","first-page":"293","article-title":"the optimum defense against random subversions in a network","author":"Hartnell","year":"1979","journal-title":"Proceedings of the Tenth Southeastern Conference on Combinatorics, Graph Theory, and Computing"},{"key":"10.1016\/0166-218X(80)90042-6_BIB5","first-page":"1277","article-title":"Command graphs","volume":"10","author":"Simmons","year":"1973","journal-title":"Colloquia Mathematica Societatis Janos Bolyai"}],"container-title":["Discrete Applied Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0166218X80900426?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:0166218X80900426?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,13]],"date-time":"2019-04-13T06:24:21Z","timestamp":1555136661000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/0166218X80900426"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1980,9]]},"references-count":5,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1980,9]]}},"alternative-id":["0166218X80900426"],"URL":"https:\/\/doi.org\/10.1016\/0166-218x(80)90042-6","relation":{},"ISSN":["0166-218X"],"issn-type":[{"value":"0166-218X","type":"print"}],"subject":[],"published":{"date-parts":[[1980,9]]}}}