@article{DAN_1968_178_3_a2,
     author = {A. H. Gudiev},
     title = {The solvability in $W_2^1$ of the first boundary value problem for a second-order elliptic equation with principal part in divergence form},
     journal = {Doklady Akademii Nauk},
     pages = {518--521},
     publisher = {mathdoc},
     volume = {178},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_178_3_a2/}
}