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Semigroups Admitting Relative Inverses
A. H. Clifford · Annals of Mathematics · 1941 · 226 citations
FUNDAMENTAL INVERSE SEMIGROUPS
W. D. Munn · The Quarterly Journal of Mathematics · 1970 · 140 citations
Norman R. Reilly · Proceedings of the Glasgow Mathematical Association · 1966 · 110 citations · Full text
A class of bisimple inverse semigroups
R. J. Warne · Pacific Journal of Mathematics · 1966 · 45 citations · Full text