@article{1102650847, author = {Hall, T. E.}, title = {The isomorphism problem for orthodox semigroups.}, journal = {Pacific J. Math.}, volume = {140}, number = {2}, year = {1989}, pages = { 123-128}, language = {en}, url = {http://dml.mathdoc.fr/item/1102650847} }
Hall, T. E. The isomorphism problem for orthodox semigroups.. Pacific J. Math., Tome 140 (1989) no. 2, pp. 123-128. http://gdmltest.u-ga.fr/item/1102650847/