中国科学院数学与系统科学研究院期刊网
ON THE EXISTENCE AND UNIQUENESS OF ALMOST PERIODIC SOLUTIONS OF THE RETARDED LIENARD EQUATION
Chun Hua FENG, Wei Gao GE
Acta Mathematicae Applicatae Sinica . 2001, (1): 27 -033 .  DOI: 10.12387/C2001021