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@article{MZ_1994__215_1_174626, author = {Mitsuru Sugimoto}, title = {A priori estimates for higher order hyperbolic equations.}, journal = {Mathematische Zeitschrift}, pages = {519--532}, publisher = {mathdoc}, volume = {215}, number = {1}, year = {1994}, zbl = {0790.35063}, url = {http://geodesic.mathdoc.fr/item/MZ_1994__215_1_174626/} }
Mitsuru Sugimoto. A priori estimates for higher order hyperbolic equations.. Mathematische Zeitschrift, Tome 215 (1994) no. 1, pp. 519-532. http://geodesic.mathdoc.fr/item/MZ_1994__215_1_174626/