@article{AL_1963_2_1_a2,
     author = {B. A. Trakhtenbrot},
     title = {On the frequency computability of functions},
     journal = {Algebra i logika},
     pages = {25--32},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1963_2_1_a2/}
}