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Luo, Liping; Peng, Baiyu; Ouyang, Zigen Oscillation criteria of nonlinear neutral hyperbolic partial differential equations. (Chinese. English summary) Zbl 1150.35487 J. Anhui Univ., Nat. Sci. 31, No. 1, 5-8 (2007). MSC: 35L67 35L70 PDFBibTeX XMLCite \textit{L. Luo} et al., J. Anhui Univ., Nat. Sci. 31, No. 1, 5--8 (2007; Zbl 1150.35487)