@article{AA_2015_27_1_a4,
     author = {A. A. Logunov},
     title = {On the boundary behavior of positive solutions of elliptic differential equations},
     journal = {Algebra i analiz},
     pages = {125--148},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2015_27_1_a4/}
}