@article{ZVMMF_1973_13_6_a2,
     author = {B. A. Bel'tyukov and S. S. Volokitin},
     title = {Block modifications of the {Aitken{\textendash}Steffensen} perturbation method},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1390--1401},
     publisher = {mathdoc},
     volume = {13},
     number = {6},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1973_13_6_a2/}
}