@article{DE_1971_7_1_a13,
     author = {R. S. Saks},
     title = {The {Dirichlet} problem for the elliptic system of {A.\,V.~Bicadze} with lower derivatives},
     journal = {Differencialʹnye uravneni\^a},
     pages = {121--134},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_1_a13/}
}