@article{DAN_1968_181_3_a3,
     author = {A. Dzhuraev},
     title = {On the theory of boundary value problems for systems of equations of composite type with multiple characteristics},
     journal = {Doklady Akademii Nauk},
     pages = {523--526},
     publisher = {mathdoc},
     volume = {181},
     number = {3},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_3_a3/}
}