@article{GDZPPN001255568, title = {An example of the limit variety of semigroups.}, journal = {Semigroup forum}, volume = {24}, year = {1982}, pages = {319-326}, zbl = {0485.20050}, url = {http://dml.mathdoc.fr/item/GDZPPN001255568} }
Volkov, M.V. An example of the limit variety of semigroups.. Semigroup forum, Tome 24 (1982) pp. 319-326. http://gdmltest.u-ga.fr/item/GDZPPN001255568/