Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1968_103_a11, author = {I. M. Petrushko}, title = {Boundary value problems for equations of mixed type}, journal = {Informatics and Automation}, pages = {181--200}, publisher = {mathdoc}, volume = {103}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1968_103_a11/} }
I. M. Petrushko. Boundary value problems for equations of mixed type. Informatics and Automation, Boundary value problems for differential equations. Part II, Tome 103 (1968), pp. 181-200. http://geodesic.mathdoc.fr/item/TRSPY_1968_103_a11/