STUDY ON THE POINCARE BIFURCATION OF QUADRATIC SYSTEM WITH TWO CENTERS AND TWO UNBOUNDED HETEROCLINIC LOOPS ONCE AGAIN
Xin Xin TAN, En Min FENG, Bo Qian SHEN
Acta Mathematicae Applicatae Sinica ›› 2004, Vol. 27 ›› Issue (2) : 300-309.
STUDY ON THE POINCARE BIFURCATION OF QUADRATIC SYSTEM WITH TWO CENTERS AND TWO UNBOUNDED HETEROCLINIC LOOPS ONCE AGAIN
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