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@article{SF_1974__9_134057, author = {W.Homer Carlisle}, title = {Subdirectly irreducible {H-semigroups.}}, journal = {Semigroup forum}, pages = {28--35}, publisher = {mathdoc}, volume = {9}, year = {1974}, zbl = {0287.20056}, url = {http://geodesic.mathdoc.fr/item/SF_1974__9_134057/} }
W.Homer Carlisle. Subdirectly irreducible H-semigroups.. Semigroup forum, Tome 9 (1974), pp. 28-35. http://geodesic.mathdoc.fr/item/SF_1974__9_134057/