TY -的盟,隋太阳广盟- Cheng PY - 2002 DA - 1900/01/01 TI -积极时滞泛函微分方程的周期解根据参数SP - 276930六世- 7 AB - SN - 1085 - 3375 UR - https://doi.org/10.1155/S1085337502000878 - 10.1155 / S1085337502000878 JF -抽象和应用分析PB - Hindawi出版公司KW - ER