@article{ZVMMF_1961_1_4_a10,
     author = {L. N. \v{S}ablickaja},
     title = {The escalator method for estimating eigenvalues},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {711--714},
     publisher = {mathdoc},
     volume = {1},
     number = {4},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1961_1_4_a10/}
}