THE THREE-PARAMETER UNFOLDING OF A KIND OF PLANAR POLYCYCLES WITH A SADDLE-NODE AND A SADDLE OF ZERO SADDLE VALUE
Li Qin ZHAO
Journal of Systems Science and Mathematical Sciences ›› 1999, Vol. 19 ›› Issue (2) : 142-149.
THE THREE-PARAMETER UNFOLDING OF A KIND OF PLANAR POLYCYCLES WITH A SADDLE-NODE AND A SADDLE OF ZERO SADDLE VALUE
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