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@article{SF_1982__24_134554, author = {M.V. Volkov}, title = {An example of the limit variety of semigroups.}, journal = {Semigroup forum}, pages = {319--326}, publisher = {mathdoc}, volume = {24}, year = {1982}, zbl = {0485.20050}, url = {http://geodesic.mathdoc.fr/item/SF_1982__24_134554/} }
M.V. Volkov. An example of the limit variety of semigroups.. Semigroup forum, Tome 24 (1982), pp. 319-326. http://geodesic.mathdoc.fr/item/SF_1982__24_134554/