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@article{PORMA_1977__36_1_115302, author = {La Rosa, B. de}, title = {On a refinement in the classification of the nil rings}, journal = {Portugaliae mathematica}, pages = {49--60}, publisher = {mathdoc}, volume = {36}, number = {1}, year = {1977}, mrnumber = {0535223}, zbl = {0412.16004}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1977__36_1_115302/} }
La Rosa, B. de. On a refinement in the classification of the nil rings. Portugaliae mathematica, Tome 36 (1977) no. 1, pp. 49-60. http://geodesic.mathdoc.fr/item/PORMA_1977__36_1_115302/