@article{DAN_1972_207_2_a2,
     author = {I. L. Vulis and M. Z. Solomyak},
     title = {Spectral asymptotics of degenerate elliptic operators},
     journal = {Doklady Akademii Nauk},
     pages = {262--265},
     publisher = {mathdoc},
     volume = {207},
     number = {2},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_207_2_a2/}
}