Duff, G. F. D. Mixed problems for hyperbolic equations of general order. (English) Zbl 0086.07603 Can. J. Math. 11, 195-221 (1959). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 5 Documents Keywords:partial differential equations PDFBibTeX XMLCite \textit{G. F. D. Duff}, Can. J. Math. 11, 195--221 (1959; Zbl 0086.07603) Full Text: DOI