@article{ZVMMF_1974_14_4_a0,
     author = {V. A. Morozov},
     title = {An optimality principle for the error when solving approximately equations with non-linear operators},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {819--827},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1974_14_4_a0/}
}