Li, Weina; He, Hongqing; Zhang, Zhiyu Oscillations of second-order nonlinear impulsive differential equations. (Chinese. English summary) Zbl 1199.34171 Math. Pract. Theory 38, No. 20, 212-216 (2008). MSC: 34C10 34A37 PDFBibTeX XMLCite \textit{W. Li} et al., Math. Pract. Theory 38, No. 20, 212--216 (2008; Zbl 1199.34171)
Li, Weina; Zhang, Zhiyu Oscillation of impulsive neutral delay differential equations. (Chinese. English summary) Zbl 1164.34507 Math. Pract. Theory 37, No. 22, 149-153 (2007). MSC: 34K11 34K40 34K45 PDFBibTeX XMLCite \textit{W. Li} and \textit{Z. Zhang}, Math. Pract. Theory 37, No. 22, 149--153 (2007; Zbl 1164.34507)