@article{DAN_1986_288_6_a4,
     author = {A. S. Makin},
     title = {Some properties of eigen- and associated functions of hypoelliptic},
     journal = {Doklady Akademii Nauk},
     pages = {1305--1307},
     publisher = {mathdoc},
     volume = {288},
     number = {6},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_288_6_a4/}
}