Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1991_321_1_a2, author = {P. A. Mishnaevskii and A. G. Ramm}, title = {A uniqueness theorem for a problem of {Goursat--Darboux} type}, journal = {Doklady Akademii Nauk}, pages = {19--22}, publisher = {mathdoc}, volume = {321}, number = {1}, year = {1991}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1991_321_1_a2/} }
P. A. Mishnaevskii; A. G. Ramm. A uniqueness theorem for a problem of Goursat--Darboux type. Doklady Akademii Nauk, Tome 321 (1991) no. 1, pp. 19-22. http://geodesic.mathdoc.fr/item/DAN_1991_321_1_a2/