Bresters, D. W. The initial value problem for operators which can be factorized into a product of Klein-Gordon operators. (English) Zbl 0242.35052 Conf. Theory ordinary partial diff. Equ., Dundee/Scotland 1972, Lect. Notes Math. 280, 227-231 (1972). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 35L30 Initial value problems for higher-order hyperbolic equations 35C99 Representations of solutions to partial differential equations PDF BibTeX XML OpenURL