@article{GDZPPN001262998, title = {Monoid varieties defined by xn+1 = ... are local.}, journal = {Semigroup forum}, volume = {46}, year = {1993}, pages = {318-326}, zbl = {0790.20087}, url = {http://dml.mathdoc.fr/item/GDZPPN001262998} }
Jones, P.R. Monoid varieties defined by xn+1 = ... are local.. Semigroup forum, Tome 46 (1993) pp. 318-326. http://gdmltest.u-ga.fr/item/GDZPPN001262998/