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Tunç, E.; Avci, H. Oscillation criteria for a class of second order nonlinear differential equations with damping. (English) Zbl 1314.34068 Bull. Math. Anal. Appl. 4, No. 2, 40-50 (2012). MSC: 34C10 34A30 PDFBibTeX XMLCite \textit{E. Tunç} and \textit{H. Avci}, Bull. Math. Anal. Appl. 4, No. 2, 40--50 (2012; Zbl 1314.34068) Full Text: Link
Hasanbulli, Mustafa; Rogovchenko, Yuri V. Oscillation criteria for second order nonlinear neutral differential equations. (English) Zbl 1195.34098 Appl. Math. Comput. 215, No. 12, 4392-4399 (2010). Reviewer: Jan Ohriska (Košice) MSC: 34K11 34K40 PDFBibTeX XMLCite \textit{M. Hasanbulli} and \textit{Y. V. Rogovchenko}, Appl. Math. Comput. 215, No. 12, 4392--4399 (2010; Zbl 1195.34098) Full Text: DOI
Xu, Zhiting Averaging technique and nonlinear second order elliptic oscillation. (English) Zbl 1168.35362 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 71, No. 5-6, 1474-1484 (2009). MSC: 35J60 35B05 35J15 PDFBibTeX XMLCite \textit{Z. Xu}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 71, No. 5--6, 1474--1484 (2009; Zbl 1168.35362) Full Text: DOI