@article{ZVMMF_1993_33_5_a12,
     author = {Yu. N. Kashtanov},
     title = {The method of generations for estimating the first eigenvalue of the},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {810--814},
     year = {1993},
     volume = {33},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1993_33_5_a12/}
}