Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1962_142_1_a4, author = {V. A. Il'in}, title = {The method of {Fourier} for an hyperbolic equation with discontinuous coefficients}, journal = {Doklady Akademii Nauk}, pages = {21--24}, publisher = {mathdoc}, volume = {142}, number = {1}, year = {1962}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_1_a4/} }
V. A. Il'in. The method of Fourier for an hyperbolic equation with discontinuous coefficients. Doklady Akademii Nauk, Tome 142 (1962) no. 1, pp. 21-24. http://geodesic.mathdoc.fr/item/DAN_1962_142_1_a4/