@article{ZVMMF_1974_14_4_a1,
     author = {G. M. Vainikko and O. O. Karma},
     title = {The convergence of approximate methods for the solution of linear and nonlinear operator equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {828--837},
     year = {1974},
     volume = {14},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1974_14_4_a1/}
}