Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1971_116_a8, author = {O. A. Ladyzhenskaya and L. Stupyalis}, title = {Boundary value problems for equations of mixed type}, journal = {Informatics and Automation}, pages = {101--136}, publisher = {mathdoc}, volume = {116}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1971_116_a8/} }
O. A. Ladyzhenskaya; L. Stupyalis. Boundary value problems for equations of mixed type. Informatics and Automation, Boundary value problems of mathematical physics. Part 7, Tome 116 (1971), pp. 101-136. http://geodesic.mathdoc.fr/item/TRSPY_1971_116_a8/