@article{IVM_1974_5_a16,
     author = {A. I. Koshelev},
     title = {The best estimates of the convergence of a~certain iteration process},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {138--143},
     publisher = {mathdoc},
     number = {5},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1974_5_a16/}
}