{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,4]],"date-time":"2026-04-04T11:33:51Z","timestamp":1775302431227,"version":"3.50.1"},"reference-count":10,"publisher":"Elsevier BV","issue":"1-4","license":[{"start":{"date-parts":[[2000,11,1]],"date-time":"2000-11-01T00:00:00Z","timestamp":973036800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Information Sciences"],"published-print":{"date-parts":[[2000,11]]},"DOI":"10.1016\/s0020-0255(00)00017-7","type":"journal-article","created":{"date-parts":[[2003,4,7]],"date-time":"2003-04-07T13:32:24Z","timestamp":1049722344000},"page":"211-220","source":"Crossref","is-referenced-by-count":46,"title":["Invariant characters of information systems under some homomorphisms"],"prefix":"10.1016","volume":"129","author":[{"given":"Li","family":"Deyu","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ma","family":"Yichen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/S0020-0255(00)00017-7_BIB1","doi-asserted-by":"crossref","first-page":"341","DOI":"10.1007\/BF01001956","article-title":"Rough sets","volume":"11","author":"Pawlak","year":"1982","journal-title":"Int. J. Inform. Comput. Sci."},{"key":"10.1016\/S0020-0255(00)00017-7_BIB2","doi-asserted-by":"crossref","first-page":"469","DOI":"10.1016\/S0020-7373(84)80022-X","article-title":"Rough classification","volume":"20","author":"Pawlak","year":"1984","journal-title":"Int. J. Man-Mach. Stud."},{"key":"10.1016\/S0020-0255(00)00017-7_BIB3","doi-asserted-by":"crossref","unstructured":"J.W. Grzymala-Busse, Algebraic properties of knowledge representation systems, in: Proceedings of the ACM SIGART International Symposium on Methodologies for Intelligent Systems, Knoxville, 1986, pp. 432\u2013440","DOI":"10.1145\/12808.12856"},{"issue":"3&4","key":"10.1016\/S0020-0255(00)00017-7_BIB4","first-page":"211","article-title":"On superfluous attributes in knowledge representation system","volume":"32","author":"Pawlak","year":"1984","journal-title":"Bull. Pol. Acad. Sci. Tech. Sci."},{"issue":"3&4","key":"10.1016\/S0020-0255(00)00017-7_BIB5","first-page":"233","article-title":"On rough sets, and information system homomorphisms","volume":"36","author":"Grzymala-Busse","year":"1988","journal-title":"Bull. Pol. Acad. Sci. Tech. Sci."},{"issue":"3&4","key":"10.1016\/S0020-0255(00)00017-7_BIB6","first-page":"99","article-title":"Knowledge representation systems, logical kits, and contexts","volume":"36","author":"Wiweger","year":"1988","journal-title":"Bull. Pol. Acad. Sci. Math."},{"key":"10.1016\/S0020-0255(00)00017-7_BIB7","series-title":"Rough Sets. Theoretical Aspects of Reasoning about Data","author":"Pawlak","year":"1991"},{"key":"10.1016\/S0020-0255(00)00017-7_BIB8","unstructured":"S.K. Pal, A. Skowron, (Eds.), Rough-Fuzzy Hybridization: A New Trend in Decision Making, Springer, Berlin, 1999"},{"key":"10.1016\/S0020-0255(00)00017-7_BIB9","doi-asserted-by":"crossref","unstructured":"L. Polkowski, A. Skowron, (Eds.), Rough Sets in Knowledge Discovery 1. Methodology and Applications, Physica-Verlag, Wurzburg, 1998","DOI":"10.1007\/978-3-7908-1883-3"},{"key":"10.1016\/S0020-0255(00)00017-7_BIB10","doi-asserted-by":"crossref","unstructured":"L. Polkowski, A. Skowron, (Eds.), Rough Sets in Knowledge Discovery 2. Applications, Case Studies and Software Systems, Physica-Verlag, Wurzburg, 1998","DOI":"10.1007\/978-3-7908-1883-3"}],"container-title":["Information Sciences"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0020025500000177?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0020025500000177?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2019,4,20]],"date-time":"2019-04-20T16:58:05Z","timestamp":1555779485000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0020025500000177"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2000,11]]},"references-count":10,"journal-issue":{"issue":"1-4","published-print":{"date-parts":[[2000,11]]}},"alternative-id":["S0020025500000177"],"URL":"https:\/\/doi.org\/10.1016\/s0020-0255(00)00017-7","relation":{},"ISSN":["0020-0255"],"issn-type":[{"value":"0020-0255","type":"print"}],"subject":[],"published":{"date-parts":[[2000,11]]}}}