Everitt, W. N.; Giertz, M. On the integrable-square classification of ordinary symmetric differential expressions. (English) Zbl 0317.34013 J. Lond. Math. Soc., II. Ser. 10, 417-426 (1975). Reviewer: M. S. P. Eastham (London) Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 10 Documents MSC: 34B20 Weyl theory and its generalizations for ordinary differential equations 34A30 Linear ordinary differential equations and systems Citations:Zbl 0191.38402; Zbl 0334.34021; Zbl 0345.34010 PDF BibTeX XML Cite \textit{W. N. Everitt} and \textit{M. Giertz}, J. Lond. Math. Soc., II. Ser. 10, 417--426 (1975; Zbl 0317.34013) Full Text: DOI OpenURL