@article{AL_1967_6_1_a4,
     author = {A. F. Bravcev},
     title = {On the congruences of the direct product of algebra},
     journal = {Algebra i logika},
     pages = {39--43},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1967_6_1_a4/}
}