@article{DAN_1996_351_6_a0,
     author = {K. Kh. Boimatov},
     title = {Spectral asymptotics of nonselfadjoint elliptic differential},
     journal = {Doklady Akademii Nauk},
     pages = {727--730},
     year = {1996},
     volume = {351},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_351_6_a0/}
}