@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/