@article{ZVMMF_1972_12_6_a21,
     author = {M. Dryja},
     title = {A priori estimates in $W_2^2$ in a convex domain for systems of elliptic difference equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1595--1601},
     publisher = {mathdoc},
     volume = {12},
     number = {6},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1972_12_6_a21/}
}