中国科学院数学与系统科学研究院期刊网
EXISTENCE OF PERIODIC SOLUTIONS IN AN OSCILLATORY SYSTEM WITH TWO DEGREES OF FREEDOM IN THREEPHASE POWER SYSTEMS
Lai Ding-wen, Wang Zheng-xian
Acta Mathematicae Applicatae Sinica . 1991, (2): 164 -173 .  DOI: 10.12387/C1991023