@article{DE_1991_27_5_a12,
     author = {E. A. Kalita},
     title = {Behavior of solutions of quasilinear elliptic systems at a nonregular boundary point},
     journal = {Differencialʹnye uravneni\^a},
     pages = {826--836},
     publisher = {mathdoc},
     volume = {27},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_5_a12/}
}