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@article{SF_1995__50_3_135382, author = {R.Z. Goldstein and P.A. Cummings}, title = {Solvable word problems in semigroups.}, journal = {Semigroup forum}, pages = {243--246}, publisher = {mathdoc}, volume = {50}, number = {3}, year = {1995}, zbl = {0821.20040}, url = {http://geodesic.mathdoc.fr/item/SF_1995__50_3_135382/} }
R.Z. Goldstein; P.A. Cummings. Solvable word problems in semigroups.. Semigroup forum, Tome 50 (1995) no. 3, pp. 243-246. http://geodesic.mathdoc.fr/item/SF_1995__50_3_135382/