@article{ZVMMF_1971_11_3_a1,
     author = {O. O. Karma},
     title = {Asymptotic estimation of the error of approximate characteristic values of holomorphic {Fredholm} operator functions},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {559--568},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1971_11_3_a1/}
}