@article{GDZPPN001264427, title = {The word problem for nilpotent inverse monoids.}, journal = {Semigroup forum}, volume = {51}, year = {1995}, pages = {285-294}, zbl = {0838.20059}, url = {http://dml.mathdoc.fr/item/GDZPPN001264427} }
Silva, P.V. The word problem for nilpotent inverse monoids.. Semigroup forum, Tome 51 (1995) pp. 285-294. http://gdmltest.u-ga.fr/item/GDZPPN001264427/