@article{DAN_1964_158_1_a8,
     author = {A. G. Kostyuchenko},
     title = {The asymptotic distribution of eigenvalues of elliptic operators},
     journal = {Doklady Akademii Nauk},
     pages = {41--44},
     publisher = {mathdoc},
     volume = {158},
     number = {1},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_158_1_a8/}
}