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@article{SF_1980__19_134385, author = {W. Ruppert}, title = {The structure of semitopological monoids defined on compact connected 3-manifolds.}, journal = {Semigroup forum}, pages = {219--246}, publisher = {mathdoc}, volume = {19}, year = {1980}, zbl = {0435.22003}, url = {http://geodesic.mathdoc.fr/item/SF_1980__19_134385/} }
W. Ruppert. The structure of semitopological monoids defined on compact connected 3-manifolds.. Semigroup forum, Tome 19 (1980), pp. 219-246. http://geodesic.mathdoc.fr/item/SF_1980__19_134385/