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@article{SF_1988__37_1_134917, author = {K.H. Hofmann and W. Weiss}, title = {More on cancellative semigroups on manifolds.}, journal = {Semigroup forum}, pages = {93--112}, publisher = {mathdoc}, volume = {37}, number = {1}, year = {1988}, zbl = {0635.22003}, url = {http://geodesic.mathdoc.fr/item/SF_1988__37_1_134917/} }
K.H. Hofmann; W. Weiss. More on cancellative semigroups on manifolds.. Semigroup forum, Tome 37 (1988) no. 1, pp. 93-112. http://geodesic.mathdoc.fr/item/SF_1988__37_1_134917/