@article{DE_1992_28_4_a9,
     author = {V. E. Balabaev},
     title = {On a class of first-order multidimensional elliptic systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {628--637},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_4_a9/}
}