@article{GDZPPN001248332, title = {The kernel of the wreath product of semigroups.}, journal = {Semigroup forum}, volume = {4}, year = {1972}, pages = {232-236}, zbl = {0274.20083}, url = {http://dml.mathdoc.fr/item/GDZPPN001248332} }
McKnight, J.D.; Sadowski, E. The kernel of the wreath product of semigroups.. Semigroup forum, Tome 4 (1972) pp. 232-236. http://gdmltest.u-ga.fr/item/GDZPPN001248332/