Chen, Lu-San Some remarks on oscillation of second order differential equations. (English) Zbl 0473.34013 Atti Accad. Naz. Lincei, VIII. Ser., Rend., Cl. Sci. Fis. Mat. Nat. 67, 45-52 (1979). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents MSC: 34C10 Oscillation theory, zeros, disconjugacy and comparison theory for ordinary differential equations 34K99 Functional-differential equations (including equations with delayed, advanced or state-dependent argument) 34A34 Nonlinear ordinary differential equations and systems Keywords:functional differential equations PDF BibTeX XML Cite \textit{L.-S. Chen}, Atti Accad. Naz. Lincei, VIII. Ser., Rend., Cl. Sci. Fis. Mat. Nat. 67, 45--52 (1979; Zbl 0473.34013)