Zeng, ZhijunZhai, Li2021-08-182021-08-182007-12-03Zeng, Z., Zhai, L. (2007). Periodicity in a delayed ratio-dependent predator-prey system with exploited term. <i>Electronic Journal of Differential Equations, 2007</i>(168), pp. 1-10.1072-6691https://hdl.handle.net/10877/14382With the help of the coincidence degree and the related continuation theorem, we explore the existence of at least two periodic solutions of a delayed ratio-dependent predator-prey system with exploited term. Some easily verifiable sufficient criteria are established for the existence of at least two positive periodic solutions.Text10 pages1 file (.pdf)enAttribution 4.0 Internationalratio-dependent predator-prey systemperiodic solutionscoincidence degreeArticle