@article{DAN_1980_251_3_a3,
     author = {A. G. Dragalin},
     title = {New forms of realizability and {Markov's} rule},
     journal = {Doklady Akademii Nauk},
     pages = {534--537},
     publisher = {mathdoc},
     volume = {251},
     number = {3},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_251_3_a3/}
}