TY - JOUR A2 - Yoshida, Norio AU - Niyaz, Tursuneli AU - Muhammadhaji, Ahmadjan PY - 2013 DA - 2013/05/30 TI - Positive Periodic Solutions of Cooperative Systems with Delays and Feedback Controls SP - 502963 VL - 2013 AB - This paper studies a class of periodic n species cooperative Lotka-Volterra systems with continuous time delays and feedback controls. Based on the continuation theorem of the coincidence degree theory developed by Gaines and Mawhin, some new sufficient conditions on the existence of positive periodic solutions are established. SN - 1687-9643 UR - https://doi.org/10.1155/2013/502963 DO - 10.1155/2013/502963 JF - International Journal of Differential Equations PB - Hindawi Publishing Corporation KW - ER -