@article{DAN_1992_326_3_a3,
     author = {M. V. Volkov},
     title = {Semigroup varieties with a modular subvariety lattice},
     journal = {Doklady Akademii Nauk},
     pages = {409--413},
     publisher = {mathdoc},
     volume = {326},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_326_3_a3/}
}