@article{ZNSL_1984_138_a3,
     author = {A. V. Ivanov},
     title = {Nonlinear nonuniformly elliptic second-order equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {35--64},
     year = {1984},
     volume = {138},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1984_138_a3/}
}