@article{DE_1970_6_12_a9,
     author = {A. F. Goryunov},
     title = {On the question of the asymptotic distribution of the eigenvalues of second order degenerate elliptic operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2214--2223},
     publisher = {mathdoc},
     volume = {6},
     number = {12},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_12_a9/}
}