中国科学院数学与系统科学研究院期刊网
Searching for Integrating Factors of the 3-rd Order Autonomous System Based on Two One-parameter Lie Groups
LI Fangfang, HU Yanxia
Acta Mathematicae Applicatae Sinica . 2011, (1): 33 -39 .  DOI: 10.12387/C2011005