@article{ZVMMF_1964_4_6_a9,
     author = {S. Yu. Ul'm},
     title = {Extension of steffensen's method for solving nonlinear operator equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1093--1097},
     publisher = {mathdoc},
     volume = {4},
     number = {6},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1964_4_6_a9/}
}