@article{AL_1999_38_3_a6,
     author = {S. A. Shakhova},
     title = {On the cardinality of the lattice of quasivarieties of},
     journal = {Algebra i logika},
     pages = {368--375},
     publisher = {mathdoc},
     volume = {38},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1999_38_3_a6/}
}