Liu, Jun; Li, Zhengbiao The almost periodic solution for a class of two-degree-of-freedom nonlinear oscillating systems. (Chinese. English summary) Zbl 1150.70375 J. Sichuan Norm. Univ., Nat. Sci. 30, No. 5, 602-605 (2007). MSC: 70K43 34C27 PDFBibTeX XMLCite \textit{J. Liu} and \textit{Z. Li}, J. Sichuan Norm. Univ., Nat. Sci. 30, No. 5, 602--605 (2007; Zbl 1150.70375)
Wang, Fan; Liu, Jun Periodic solutions and stability for a class of prey-predator systems. (Chinese. English summary) Zbl 1015.34036 J. Sichuan Norm. Univ., Nat. Sci. 25, No. 3, 270-274 (2002). MSC: 34C25 92D25 34D20 PDFBibTeX XMLCite \textit{F. Wang} and \textit{J. Liu}, J. Sichuan Norm. Univ., Nat. Sci. 25, No. 3, 270--274 (2002; Zbl 1015.34036)
Liu, Jun; Wang, Fan Periodic property and stability of the solutions for a class of dynamical models of immune response. (Chinese. English summary) Zbl 0995.92023 J. Sichuan Norm. Univ., Nat. Sci. 24, No. 5, 455-459 (2001). MSC: 92C50 34D05 37N25 34C25 PDFBibTeX XMLCite \textit{J. Liu} and \textit{F. Wang}, J. Sichuan Norm. Univ., Nat. Sci. 24, No. 5, 455--459 (2001; Zbl 0995.92023)
Liu, Jun; Xun, Fengxian; Zhong, Chaoyan The asymptotic behavior of solution for a class of nonlinear autonomous system. (Chinese. English summary) Zbl 0974.35067 J. Sichuan Norm. Univ., Nat. Sci. 23, No. 6, 584-587 (2000). MSC: 35K90 35K60 35B40 PDFBibTeX XMLCite \textit{J. Liu} et al., J. Sichuan Norm. Univ., Nat. Sci. 23, No. 6, 584--587 (2000; Zbl 0974.35067)
Liu, Jun On the asymptotic behavior of solutions to some third-order nonautonomous differential equations. (Chinese. English summary) Zbl 0963.34036 J. Sichuan Norm. Univ., Nat. Sci. 23, No. 2, 138-141 (2000). MSC: 34D05 PDFBibTeX XMLCite \textit{J. Liu}, J. Sichuan Norm. Univ., Nat. Sci. 23, No. 2, 138--141 (2000; Zbl 0963.34036)
Liu, Jun Periodic solutions to some periodical systems. (Chinese. English summary) Zbl 0949.34033 J. Sichuan Norm. Univ., Nat. Sci. 22, No. 3, 289-294 (1999). MSC: 34C25 PDFBibTeX XMLCite \textit{J. Liu}, J. Sichuan Norm. Univ., Nat. Sci. 22, No. 3, 289--294 (1999; Zbl 0949.34033)