Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1970_6_4_a13, author = {N. I. Brisch}, title = {On mixed problems for certain semihyperbolic equations}, journal = {Differencialʹnye uravneni\^a}, pages = {705--720}, publisher = {mathdoc}, volume = {6}, number = {4}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1970_6_4_a13/} }
N. I. Brisch. On mixed problems for certain semihyperbolic equations. Differencialʹnye uravneniâ, Tome 6 (1970) no. 4, pp. 705-720. http://geodesic.mathdoc.fr/item/DE_1970_6_4_a13/