@article{DAN_1966_171_2_a8,
     author = {B. A. Kushner},
     title = {Certain properties of quasi-numbers and operators from quasi-numbers into quasi-numbers},
     journal = {Doklady Akademii Nauk},
     pages = {275--277},
     publisher = {mathdoc},
     volume = {171},
     number = {2},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_171_2_a8/}
}