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Publication:3337836
zbMath0546.35040MaRDI QIDQ3337836
Publication date: 1983
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
A priori estimates in context of PDEs (35B45) Global differential geometry of Lorentz manifolds, manifolds with indefinite metrics (53C50) Higher-order hyperbolic equations (35L25)
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