{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,16]],"date-time":"2026-03-16T10:17:21Z","timestamp":1773656241561,"version":"3.50.1"},"reference-count":10,"publisher":"Elsevier BV","issue":"1-3","license":[{"start":{"date-parts":[[2000,2,1]],"date-time":"2000-02-01T00:00:00Z","timestamp":949363200000},"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":4915,"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":[[2000,2]]},"DOI":"10.1016\/s0166-218x(99)00130-4","type":"journal-article","created":{"date-parts":[[2002,7,25]],"date-time":"2002-07-25T19:07:02Z","timestamp":1027624022000},"page":"149-156","source":"Crossref","is-referenced-by-count":43,"title":["Covering a rectangle with six and seven circles"],"prefix":"10.1016","volume":"99","author":[{"given":"J.B.M.","family":"Melissen","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.C.","family":"Schuur","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/S0166-218X(99)00130-4_BIB1","unstructured":"E.H.L. Aarts, J.H.M. Korst, Simulated Annealing and Boltzmann Machines, Wiley, Chichester, 1989."},{"key":"10.1016\/S0166-218X(99)00130-4_BIB2","doi-asserted-by":"crossref","unstructured":"H.T. Croft, K.J. Falconer, R.K. Guy, Unsolved Problems in Geometry, Springer, Berlin, 1991.","DOI":"10.1007\/978-1-4612-0963-8"},{"key":"10.1016\/S0166-218X(99)00130-4_BIB3","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1023\/A:1004224507766","article-title":"Covering a rectangle with equal circles","volume":"34","author":"Heppes","year":"1997","journal-title":"Period. Math. Hungar."},{"key":"10.1016\/S0166-218X(99)00130-4_BIB4","doi-asserted-by":"crossref","first-page":"671","DOI":"10.1126\/science.220.4598.671","article-title":"Optimization by simulated annealing","volume":"220","author":"Kirkpatrick","year":"1983","journal-title":"Science"},{"key":"10.1016\/S0166-218X(99)00130-4_BIB5","doi-asserted-by":"crossref","unstructured":"J.B.M. Melissen, Packing and Covering with Circles, Ph.D. Thesis, University of Utrecht, 1997.","DOI":"10.2307\/2691433"},{"key":"10.1016\/S0166-218X(99)00130-4_BIB6","doi-asserted-by":"crossref","first-page":"R32","DOI":"10.37236\/1256","article-title":"Improved coverings of a square with six and eight equal circles","volume":"3","author":"Melissen","year":"1996","journal-title":"Electron. J. Combin."},{"key":"10.1016\/S0166-218X(99)00130-4_BIB7","unstructured":"J.B.M. Melissen, P.C. Schuur, A. Heppes, Zs. G\u00e1sp\u00e1r, T. Tarnai, New circle coverings of an equilateral triangle, accepted for publication."},{"key":"10.1016\/S0166-218X(99)00130-4_BIB8","doi-asserted-by":"crossref","unstructured":"J. Pach, P.K. Agarwal, Combinatorial Geometry, Wiley, New York, 1995.","DOI":"10.1002\/9781118033203"},{"key":"10.1016\/S0166-218X(99)00130-4_BIB9","first-page":"167","article-title":"Covering a square by equal circles","volume":"50","author":"Tarnai","year":"1995","journal-title":"Elem. Math."},{"key":"10.1016\/S0166-218X(99)00130-4_BIB10","doi-asserted-by":"crossref","first-page":"164","DOI":"10.1112\/jlms\/s1-24.3.164","article-title":"On the least number of unit circles which can cover a square","volume":"24","author":"Verblunsky","year":"1949","journal-title":"J. London Math. Soc."}],"container-title":["Discrete Applied Mathematics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0166218X99001304?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0166218X99001304?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2021,5,10]],"date-time":"2021-05-10T06:36:03Z","timestamp":1620628563000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0166218X99001304"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2000,2]]},"references-count":10,"journal-issue":{"issue":"1-3","published-print":{"date-parts":[[2000,2]]}},"alternative-id":["S0166218X99001304"],"URL":"https:\/\/doi.org\/10.1016\/s0166-218x(99)00130-4","relation":{},"ISSN":["0166-218X"],"issn-type":[{"value":"0166-218X","type":"print"}],"subject":[],"published":{"date-parts":[[2000,2]]}}}