@article{VSGTU_2013_1_a3,
     author = {A. A. Andreev and J. O. Yakovleva},
     title = {The characteristic problem for the system of the general hyperbolic differential equations 
},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {31--36},
     publisher = {mathdoc},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2013_1_a3/}
}