Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1969_5_12_a6, author = {N. I. Brisch}, title = {Mixed problems for certain semihyperbolic equations}, journal = {Differencialʹnye uravneni\^a}, pages = {2200--2215}, publisher = {mathdoc}, volume = {5}, number = {12}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_12_a6/} }
N. I. Brisch. Mixed problems for certain semihyperbolic equations. Differencialʹnye uravneniâ, Tome 5 (1969) no. 12, pp. 2200-2215. http://geodesic.mathdoc.fr/item/DE_1969_5_12_a6/