@article{SM_1985_50_2_a3,
     author = {A. A. Novruzov},
     title = {On an approach to the study of qualitative properties of solutions of nondivergence elliptic equations of second order},
     journal = {Sbornik. Mathematics},
     pages = {343--367},
     publisher = {mathdoc},
     volume = {50},
     number = {2},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1985_50_2_a3/}
}