@article{AL_1967_6_4_a1,
     author = {A. A. Vinogradov},
     title = {Minimal quasi-varieties of rings and relation algebras},
     journal = {Algebra i logika},
     pages = {3--10},
     year = {1967},
     volume = {6},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1967_6_4_a1/}
}