@article{SM_1979_35_6_a3,
     author = {I. Kametaka and O. A. Oleinik},
     title = {On the asymptotic properties and necessary conditions for existence of solutions of nonlinear second order elliptic equations},
     journal = {Sbornik. Mathematics},
     pages = {823--849},
     year = {1979},
     volume = {35},
     number = {6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1979_35_6_a3/}
}