@article{DAN_1985_280_2_a9,
     author = {A. Toraev},
     title = {The oscillation of solutions of elliptic equations},
     journal = {Doklady Akademii Nauk},
     pages = {300--303},
     year = {1985},
     volume = {280},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_280_2_a9/}
}