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@article{SF_1992__45_3_135189, author = {G. Poll\'ak and A. Ali Ismaeel}, title = {The translational hull of a subsemigroup of a semilattice of groups.}, journal = {Semigroup forum}, pages = {264--266}, publisher = {mathdoc}, volume = {45}, number = {3}, year = {1992}, zbl = {0793.20059}, url = {http://geodesic.mathdoc.fr/item/SF_1992__45_3_135189/} }
G. Pollák; A. Ali Ismaeel. The translational hull of a subsemigroup of a semilattice of groups.. Semigroup forum, Tome 45 (1992) no. 3, pp. 264-266. http://geodesic.mathdoc.fr/item/SF_1992__45_3_135189/