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@article{SF_1977__14_186375, author = {J.C. Spehner}, title = {Presentations et presentations simplifiables d'un monoide simplifiable.}, journal = {Semigroup forum}, pages = {295--330}, publisher = {mathdoc}, volume = {14}, year = {1977}, zbl = {0477.20037}, url = {http://geodesic.mathdoc.fr/item/SF_1977__14_186375/} }
J.C. Spehner. Presentations et presentations simplifiables d'un monoide simplifiable.. Semigroup forum, Tome 14 (1977), pp. 295-330. http://geodesic.mathdoc.fr/item/SF_1977__14_186375/