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- [21] Existence of three periodic solutions for a nonlinear first order functional differential equation JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS, 2009, 346 (08): : 818 - 829
- [28] On the Existence of Periodic Solutions for a Kind of Second Order Neutral Functional Differential Equation Acta Mathematica Sinica, 2005, 21 : 381 - 392
- [29] SOLUTIONS OF A FUNCTIONAL DIFFERENTIAL EQUATION AMERICAN MATHEMATICAL MONTHLY, 1969, 76 (09): : 1031 - &