@article{ZNSL_1969_14_a9,
     author = {V. Ya. Rivkind and N. N. Ural'tseva},
     title = {The solvability of the diffraction problems for quasilinear parabolic equations},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {191--199},
     publisher = {mathdoc},
     volume = {14},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1969_14_a9/}
}