中国科学院数学与系统科学研究院期刊网
On the Existence and Uniqueness of Periodic Solutions of a Kind of Integro-Differential Equations
Feng De CHEN, De Xian SUN, Jin
Acta Mathematica Sinica, Chinese Series . 2004, (5): 973 -984 .  DOI: 10.12386/A2004sxxb0122