@article{ZVMMF_1997_37_9_a10,
     author = {Yu. N. Kashtanov},
     title = {The method of generations for estimating the first eigenvalue of the {Neumann} problem},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1105--1111},
     publisher = {mathdoc},
     volume = {37},
     number = {9},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1997_37_9_a10/}
}