@article{ISU_2013_13_1_a0,
     author = {A. A. Andreev and J. O. Yakovleva},
     title = {The {Characteristic} {Problem} for one {Hyperbolic} {Differentional} {Equation} of the {Third} {Order} with {Nonmultiple} {Characteristics}},
     journal = {Izvestiya of Saratov University. Mathematics. Mechanics. Informatics},
     pages = {3--6},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ISU_2013_13_1_a0/}
}