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@article{SF_1993__46_1_135229, author = {C. Vachuska}, title = {On the lattice of completely regular monoid varieties.}, journal = {Semigroup forum}, pages = {168--186}, publisher = {mathdoc}, volume = {46}, number = {1}, year = {1993}, zbl = {0774.20037}, url = {http://geodesic.mathdoc.fr/item/SF_1993__46_1_135229/} }
C. Vachuska. On the lattice of completely regular monoid varieties.. Semigroup forum, Tome 46 (1993) no. 1, pp. 168-186. http://geodesic.mathdoc.fr/item/SF_1993__46_1_135229/