@article{ZVMMF_2010_50_7_a1,
     author = {E. M. Maleko},
     title = {On the computation of the spectrum of directionally perturbed operators},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1179--1199},
     publisher = {mathdoc},
     volume = {50},
     number = {7},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2010_50_7_a1/}
}