@article{DAN_1992_322_3_a0,
     author = {K. Kh. Boimatov},
     title = {Spectral asymptotics of linear and nonlinear pencils of pseudodifferential operators that are elliptic in the {Douglis{\textendash}Nirenberg} sense},
     journal = {Doklady Akademii Nauk},
     pages = {441--445},
     year = {1992},
     volume = {322},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_322_3_a0/}
}