@article{DAN_1979_248_3_a0,
     author = {K. Kh. Boimatov},
     title = {Distribution of eigenvalues of degenerate elliptic operators},
     journal = {Doklady Akademii Nauk},
     pages = {521--524},
     publisher = {mathdoc},
     volume = {248},
     number = {3},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_248_3_a0/}
}