@article{VSGU_2010_4_a10,
     author = {G. Yu. Udalova},
     title = {Inverse problem for equation of mixed elliptic-hyperbolic type},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {89--97},
     publisher = {mathdoc},
     number = {4},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2010_4_a10/}
}