@article{DE_2003_39_7_a12,
     author = {V. G. Prikazchikov},
     title = {Two-Sided {Estimates} of {Eigenvalues} of an {Elliptic} {Operator}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {974--981},
     publisher = {mathdoc},
     volume = {39},
     number = {7},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_7_a12/}
}