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@article{SF_1972__4_133898, author = {J.D. McKnight and E. Sadowski}, title = {The kernel of the wreath product of semigroups.}, journal = {Semigroup forum}, pages = {232--236}, publisher = {mathdoc}, volume = {4}, year = {1972}, zbl = {0274.20083}, url = {http://geodesic.mathdoc.fr/item/SF_1972__4_133898/} }
J.D. McKnight; E. Sadowski. The kernel of the wreath product of semigroups.. Semigroup forum, Tome 4 (1972), pp. 232-236. http://geodesic.mathdoc.fr/item/SF_1972__4_133898/