Voir la notice de l'article provenant de la source Math-Net.Ru
@article{TRSPY_1976_142_a3, author = {A. V. Bitsadze}, title = {On the theory of systems of partial differential equations}, journal = {Informatics and Automation}, pages = {67--77}, publisher = {mathdoc}, volume = {142}, year = {1976}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/TRSPY_1976_142_a3/} }
A. V. Bitsadze. On the theory of systems of partial differential equations. Informatics and Automation, Number theory, mathematical analysis and their applications, Tome 142 (1976), pp. 67-77. http://geodesic.mathdoc.fr/item/TRSPY_1976_142_a3/