中国科学院数学与系统科学研究院期刊网
AMS
Bifurcation of Limit Cycles for a Perturbed Piecewise Quadratic Differential Systems
Gui Lin JI, Chang Jian LIU, Peng Heng LI
Acta Mathematica Sinica . 2022, (3): 591 -611 .  DOI: 10.1007/s10114-022-0513-z