@article{DAN_1977_232_6_a4,
     author = {M. I. Kanovich},
     title = {On the precision of a complexity criterion for nonrecursiveness and universality},
     journal = {Doklady Akademii Nauk},
     pages = {1249--1252},
     publisher = {mathdoc},
     volume = {232},
     number = {6},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_232_6_a4/}
}