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@article{MAN_1966__163_161378, author = {A. DOUGLIS}, title = {On {Weak} {Solutions} of {Non-Linear} {Partial} {Differential} {Equations} with {Real} {Characteristics.}}, journal = {Mathematische Annalen}, pages = {351--358}, publisher = {mathdoc}, volume = {163}, year = {1966}, zbl = {0137.28904}, url = {http://geodesic.mathdoc.fr/item/MAN_1966__163_161378/} }
A. DOUGLIS. On Weak Solutions of Non-Linear Partial Differential Equations with Real Characteristics.. Mathematische Annalen, Tome 163 (1966), pp. 351-358. http://geodesic.mathdoc.fr/item/MAN_1966__163_161378/