@article{DAN_1987_296_3_a6,
     author = {Ya. A. Roitberg and Z. G. Sheftel},
     title = {The solvability, in $L_p$-spaces of generalized functions, of general boundary value problems for strongly degenerate elliptic systems},
     journal = {Doklady Akademii Nauk},
     pages = {542--546},
     publisher = {mathdoc},
     volume = {296},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_296_3_a6/}
}