@article{DAN_1967_173_2_a4,
     author = {A. Dzhuraev},
     title = {On the index and normal solvability of the general linear boundary value problem for a system of equations of composite type},
     journal = {Doklady Akademii Nauk},
     pages = {260--263},
     publisher = {mathdoc},
     volume = {173},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_173_2_a4/}
}