@article{DAN_1985_283_3_a3,
     author = {A. R. Its and V. V. Sukhanov},
     title = {The matrix {Riemann} problem on a system of rays and inverse},
     journal = {Doklady Akademii Nauk},
     pages = {534--538},
     publisher = {mathdoc},
     volume = {283},
     number = {3},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_283_3_a3/}
}