Titchmarsh, E. C. Some theorems on perturbation theory. III, IV. (English) Zbl 0045.19503 Proc. R. Soc. Lond., Ser. A 207, 321-328 (1951); 210, 30-47 (1951). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 11 Documents Keywords:ordinary differential equations PDFBibTeX XMLCite \textit{E. C. Titchmarsh}, Proc. R. Soc. Lond., Ser. A 207, 321--328 (1951; Zbl 0045.19503) Full Text: DOI