Semigroups all but one of whose proper subsemigroups are groups.
Semigroup forum, Tome 10 (1975), pp. 215-219
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ZblJ.R. Gard. Semigroups all but one of whose proper subsemigroups are groups.. Semigroup forum, Tome 10 (1975), pp. 215-219. http://geodesic.mathdoc.fr/item/SF_1975__10_134113/
@article{SF_1975__10_134113,
author = {J.R. Gard},
title = {Semigroups all but one of whose proper subsemigroups are groups.},
journal = {Semigroup forum},
pages = {215--219},
year = {1975},
volume = {10},
zbl = {0299.20041},
url = {http://geodesic.mathdoc.fr/item/SF_1975__10_134113/}
}