@article{AL_1970_9_1_a5,
     author = {S. V. Smirnov},
     title = {\v{C}eby\v{s}ev approximations and the theory of models},
     journal = {Algebra i logika},
     pages = {73--79},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1970_9_1_a5/}
}