@article{ZVMMF_1987_27_3_a16,
     author = {N. D. Kopachevskii and M. Yu. Tsar'kov},
     title = {On the problem of the spectrum of a buoyancy operator},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {463--466},
     publisher = {mathdoc},
     volume = {27},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1987_27_3_a16/}
}