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@article{SF_1984__28_134640, author = {J.E. Pin}, title = {On semidirect products of two finite semilattices.}, journal = {Semigroup forum}, pages = {73--82}, publisher = {mathdoc}, volume = {28}, year = {1984}, zbl = {0527.20046}, url = {http://geodesic.mathdoc.fr/item/SF_1984__28_134640/} }
J.E. Pin. On semidirect products of two finite semilattices.. Semigroup forum, Tome 28 (1984), pp. 73-82. http://geodesic.mathdoc.fr/item/SF_1984__28_134640/