@article{AL_1964_3_4_a0,
     author = {A. I. Mal'tsev},
     title = {On the theory of computable families of objects},
     journal = {Algebra i logika},
     pages = {5--31},
     publisher = {mathdoc},
     volume = {3},
     number = {4},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1964_3_4_a0/}
}