@article{GDZPPN00125409X, title = {The finiteness of a base of indentities for fiveelement monoids}, journal = {Semigroup forum}, volume = {20}, year = {1980}, pages = {171-186}, zbl = {0439.20036}, url = {http://dml.mathdoc.fr/item/GDZPPN00125409X} }
Tishchenko, A.V. The finiteness of a base of indentities for fiveelement monoids. Semigroup forum, Tome 20 (1980) pp. 171-186. http://gdmltest.u-ga.fr/item/GDZPPN00125409X/