@article{DAN_1985_280_6_a3,
     author = {S. Z. Levendorskii},
     title = {Spectral asymptotics of differential operators with operator coefficients and some applications},
     journal = {Doklady Akademii Nauk},
     pages = {1303--1306},
     publisher = {mathdoc},
     volume = {280},
     number = {6},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_280_6_a3/}
}