@article{DAN_1970_194_3_a4,
     author = {M. I. Kanovich},
     title = {Complexity of the decidability of an enumerable set as a criterion of its universality},
     journal = {Doklady Akademii Nauk},
     pages = {500--503},
     publisher = {mathdoc},
     volume = {194},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_194_3_a4/}
}