@article{01051455,
title = {On the solvability of the multidimensional version of the first Darboux problem for a model second-order degenerating hyperbolic equation.},
journal = {Georgian Mathematical Journal},
volume = {4},
year = {1997},
pages = {341-354},
doi = {10.1023/A:1022942528940},
zbl = {0880.35079},
language = {en},
url = {http://dml.mathdoc.fr/item/01051455}
}
Kharibegashvili, S. On the solvability of the multidimensional version of the first Darboux problem for a model second-order degenerating hyperbolic equation.. Georgian Mathematical Journal, Tome 4 (1997) pp. 341-354. doi : 10.1023/A:1022942528940. http://gdmltest.u-ga.fr/item/01051455/