中国科学院数学与系统科学研究院期刊网
AMS
A Priori Bounds for Periodic Solutions of a Kind of Second Order Neutral Functional Differential Equation with Multiple Deviating Arguments
Shi Ping LU, Wei Gao GE
Acta Mathematica Sinica . 2005, (6): 1309 -1314 .  DOI: 10.1007/s10114-005-0567-8