@article{UZKU_1965_125_2_a2,
     author = {B. G. Gabdulkhaev},
     title = {A note on the general theory of approximate methods in analysis},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {18--31},
     publisher = {mathdoc},
     volume = {125},
     number = {2},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1965_125_2_a2/}
}