Periodic solutions for a second order nonlinear functional differential equation

Periodic Solutions of Single-Species Models with Periodic Delay

H. I. Freedman · SIAM Journal on Mathematical Analysis · 1992 · 196 citations

Life Sciences, Biology, Ecology +15

Existence of Positive Periodic Solutions for Non-Autonomous Functional Differential Equations

Sui Sun Cheng, Guang Zhang · DOAJ (DOAJ: Directory of Open Access Journals) · 2001 · 72 citations

Natural Sciences, Mathematics, Differential Equations +10

A new existence theory for positive periodic solutions to functional differential equations

Aying Wan, Daqing Jiang, Xiaojie Xu · Computers & Mathematics with Applications · 2004 · 71 citations

Natural Sciences, Mathematics, Differential Equations +12

Existence, uniqueness and asymptotic stability of periodic solutions of periodic functional-differential systems

Baorong Tang, Yang Kuang · Tohoku Mathematical Journal · 1997 · 57 citations · Full text

Natural Sciences, Mathematics, Biological Control +14

EXISTENCE OF POSITIVE PERIODIC SOLUTIONS FOR FUNCTIONAL DIFFERENTIAL EQUATIONS

Aying Wan, Daqing Jiang · Kyushu Journal of Mathematics · 2002 · 50 citations · Full text

Natural Sciences, Mathematics, Differential Equations +8