The minimum of the antichains in the factor poset

GERARD JENNHWA CHANG2018-09-102018-09-101987http://www.scopus.com/inward/record.url?eid=2-s2.0-34250102598&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/329049The minimum of the antichains in the factor posetjournal article10.1007/BF00340777