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@article{MZM_1984_35_5_a4, author = {S. A. Gurchenkov}, title = {Coverings in the lattice $l$-varieties}, journal = {Matemati\v{c}eskie zametki}, pages = {677--684}, publisher = {mathdoc}, volume = {35}, number = {5}, year = {1984}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_5_a4/} }
S. A. Gurchenkov. Coverings in the lattice $l$-varieties. Matematičeskie zametki, Tome 35 (1984) no. 5, pp. 677-684. http://geodesic.mathdoc.fr/item/MZM_1984_35_5_a4/