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@article{SF_1994__48_3_135320, author = {M. Ciric and S. Bogdanovic}, title = {Nil-extensions of unions of groups induced by identities.}, journal = {Semigroup forum}, pages = {303--312}, publisher = {mathdoc}, volume = {48}, number = {3}, year = {1994}, zbl = {0803.20037}, url = {http://geodesic.mathdoc.fr/item/SF_1994__48_3_135320/} }
M. Ciric; S. Bogdanovic. Nil-extensions of unions of groups induced by identities.. Semigroup forum, Tome 48 (1994) no. 3, pp. 303-312. http://geodesic.mathdoc.fr/item/SF_1994__48_3_135320/