@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/