@article{GDZPPN001255347, title = {The variety generated by finite nilpotent monoids.}, journal = {Semigroup forum}, volume = {24}, year = {1982}, pages = {25-38}, zbl = {0503.20024}, url = {http://dml.mathdoc.fr/item/GDZPPN001255347} }
Straubing, H. The variety generated by finite nilpotent monoids.. Semigroup forum, Tome 24 (1982) pp. 25-38. http://gdmltest.u-ga.fr/item/GDZPPN001255347/