@article{FAA_1971_5_3_a12,
     author = {V. N. Tulovskii},
     title = {Distribution of the eigenvalues for differential operators with constant coefficients},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {85--90},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1971_5_3_a12/}
}