References
Clifford, A.H. and G.B. Preston,The Algebraic Theory of Semigroups, Mathematical Surveys, No. 7, Vol. I, Amer. Math. Soc., Providence, 1961.
Pollák, G. and L. Rédei,Die Halbgruppen deren alle echten Teilhalbgruppen Gruppen sind, Publ. Math. Debrecen 6 (1959), 126–130.
Schwarz, Š.,Semigroups in which every proper subideal is a group, Acta Sci. Math. Szeged 21 (1960), 125–131.
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Gard, J. Semigroups all but one of whose proper subsemigroups are groups. Semigroup Forum 10, 215–219 (1975). https://doi.org/10.1007/BF02194888
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DOI: https://doi.org/10.1007/BF02194888