@article{TIMB_2009_17_2_a2,
     author = {V. I. Korzyuk and E. S. Cheb and M. S. Shirma},
     title = {Solution of the first mixed problem for the wave equation by the method of characteristics},
     journal = {Trudy Instituta matematiki},
     pages = {23--34},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMB_2009_17_2_a2/}
}