@article{DAN_1970_195_3_a15,
     author = {V. N. Tulovskii},
     title = {Asymptotic distribution of the eigenvalues for differential operators with constant coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {570--573},
     publisher = {mathdoc},
     volume = {195},
     number = {3},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1970_195_3_a15/}
}