Teng, Zhidong; Chen, Lansun Global asymptotic stability of periodic Lotka-Volterra systems with delays. (Chinese. English summary) Zbl 0962.34058 Acta Math. Sci. (Chin. Ed.) 20, No. 3, 296-303 (2000). MSC: 34K20 92D25 34K13 PDFBibTeX XMLCite \textit{Z. Teng} and \textit{L. Chen}, Acta Math. Sci. (Chin. Ed.) 20, No. 3, 296--303 (2000; Zbl 0962.34058)
Teng, Zhidong; Chen, Lansun Necessary and sufficient conditions for existence of positive periodic solutions of periodic predator-prey systems. (Chinese. English summary) Zbl 0914.92019 Acta Math. Sci. (Chin. Ed.) 18, No. 4, 402-406 (1998). MSC: 92D25 34C25 92D40 34C23 PDFBibTeX XMLCite \textit{Z. Teng} and \textit{L. Chen}, Acta Math. Sci. (Chin. Ed.) 18, No. 4, 402--406 (1998; Zbl 0914.92019)