@article{SM_1995_83_1_a2,
     author = {V. A. Kondrat'ev and A. A. Kon'kov},
     title = {On properties of solutions of a~class of nonlinear second-order equations},
     journal = {Sbornik. Mathematics},
     pages = {67--77},
     publisher = {mathdoc},
     volume = {83},
     number = {1},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_83_1_a2/}
}