@article{SF_1995__51_1_135416,
     author = {P.V. Silva},
     title = {The word problem for nilpotent inverse monoids.},
     journal = {Semigroup forum},
     pages = {285--294},
     publisher = {mathdoc},
     volume = {51},
     number = {1},
     year = {1995},
     zbl = {0838.20059},
     url = {http://geodesic.mathdoc.fr/item/SF_1995__51_1_135416/}
}