@article{DAN_1971_199_4_a11,
     author = {V. A. Nepomnyashchii},
     title = {On the completeness of operations in operator algorithms},
     journal = {Doklady Akademii Nauk},
     pages = {780--782},
     year = {1971},
     volume = {199},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_199_4_a11/}
}