@article{AL_2010_49_3_a0,
     author = {B. M. Vernikov and V. Yu. Shaprynskii},
     title = {Distributive elements of the lattice of semigroup varieties},
     journal = {Algebra i logika},
     pages = {303--330},
     publisher = {mathdoc},
     volume = {49},
     number = {3},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2010_49_3_a0/}
}