关于(Ⅱ)类方程极限环个数问题

肖箭;盛立人

ON THE PROBLEM OF THE NUMBER OF LIMIT CYCLES OF SYSTEMS OF TYPE (Ⅱ)

Jian XIAO;Li Ren SHENG

系统科学与数学 . 1999, (4): 420 -425 . DOI: 10.12341/jssms09791