@article{DAN_1963_151_1_a21,
     author = {B. M. Stepanov},
     title = {The construction of $S$-matrices},
     journal = {Doklady Akademii Nauk},
     pages = {84--86},
     year = {1963},
     volume = {151},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_151_1_a21/}
}