@article{SM_1984_49_2_a10,
     author = {A. I. Ibragimov},
     title = {On some qualitative properties of solutions of elliptic equations with continuous coefficients},
     journal = {Sbornik. Mathematics},
     pages = {447--460},
     publisher = {mathdoc},
     volume = {49},
     number = {2},
     year = {1984},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1984_49_2_a10/}
}