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@article{MMO_1970_23_a2, author = {S. I. Poho\v{z}aev}, title = {Weakly nonlinear hyperbolic systems}, journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva}, pages = {61--76}, publisher = {mathdoc}, volume = {23}, year = {1970}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MMO_1970_23_a2/} }
S. I. Pohožaev. Weakly nonlinear hyperbolic systems. Trudy Moskovskogo matematičeskogo obŝestva, Trudy Moskovskogo Matematicheskogo Obshchestva, Tome 23 (1970), pp. 61-76. http://geodesic.mathdoc.fr/item/MMO_1970_23_a2/