@article{DE_1969_5_1_a9,
     author = {E. A. Baderko},
     title = {On the {Dirichlet} problem for degenerate elliptic systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {131--140},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_1_a9/}
}