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@article{SF_1991__42_3_135061, author = {F. Pastijn}, title = {Pseudovarieties of completely regular semigroups.}, journal = {Semigroup forum}, pages = {1--46}, publisher = {mathdoc}, volume = {42}, number = {3}, year = {1991}, zbl = {0719.20031}, url = {http://geodesic.mathdoc.fr/item/SF_1991__42_3_135061/} }
F. Pastijn. Pseudovarieties of completely regular semigroups.. Semigroup forum, Tome 42 (1991) no. 3, pp. 1-46. http://geodesic.mathdoc.fr/item/SF_1991__42_3_135061/