@article{GDZPPN001263382, title = {Nil-extensions of unions of groups induced by identities.}, journal = {Semigroup forum}, volume = {48}, year = {1994}, pages = {303-312}, zbl = {0803.20037}, url = {http://dml.mathdoc.fr/item/GDZPPN001263382} }
Ciric, M.; Bogdanovic, S. Nil-extensions of unions of groups induced by identities.. Semigroup forum, Tome 48 (1994) pp. 303-312. http://gdmltest.u-ga.fr/item/GDZPPN001263382/