@article{DAN_1985_284_2_a7,
     author = {N. N. Tarkhanov},
     title = {The {Carleman} matrix for elliptic systems},
     journal = {Doklady Akademii Nauk},
     pages = {294--297},
     publisher = {mathdoc},
     volume = {284},
     number = {2},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_284_2_a7/}
}