@article{AL_1976_15_3_a5,
     author = {D. M. Smirnov},
     title = {Regularly definable varieties of algebras},
     journal = {Algebra i logika},
     pages = {331--342},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1976_15_3_a5/}
}