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@article{SF_1990__40_1_135004, author = {B. M. Vernikov}, title = {Dualities in lattices of semigroup varieties.}, journal = {Semigroup forum}, pages = {59--76}, publisher = {mathdoc}, volume = {40}, number = {1}, year = {1990}, zbl = {0687.20055}, url = {http://geodesic.mathdoc.fr/item/SF_1990__40_1_135004/} }
B. M. Vernikov. Dualities in lattices of semigroup varieties.. Semigroup forum, Tome 40 (1990) no. 1, pp. 59-76. http://geodesic.mathdoc.fr/item/SF_1990__40_1_135004/