@article{VSGTU_2013_1_a5,
     author = {A. A. Gimaltdinova},
     title = {Tricomi problem for a mixed type equation with two lines of type changing  in a special area},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {46--52},
     publisher = {mathdoc},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2013_1_a5/}
}