@article{IVM_2006_9_a0,
     author = {S. A. Aldashev},
     title = {Darboux--Protter problems for degenerate multidimensional hyperbolic equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--9},
     publisher = {mathdoc},
     number = {9},
     year = {2006},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2006_9_a0/}
}