中国科学院数学与系统科学研究院期刊网
PERIODIC SOLUTIONS OF LINEAR NONCONVOLUTK VOLTERRA INTEGRAL EQUATIONS AND INTEGRODIFFERENTIAL EQUATIONS
Wang Zhi-cheng
Acta Mathematicae Applicatae Sinica . 1991, (2): 145 -154 .  DOI: 10.12387/C1991021