@article{ZVMMF_1976_16_5_a1,
     author = {V. V. Ditkin},
     title = {The approximate computation of the eigenvalues that lie in a given part of a complex plane},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1102--1109},
     publisher = {mathdoc},
     volume = {16},
     number = {5},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1976_16_5_a1/}
}