The Three-parameter Unifoldings of Several Kinds of Planar Polycycles with Two Saddle-nodes and One Saddle
LiQin Zhao
Acta Mathematica Sinica, Chinese Series ›› 1998, Vol. 41 ›› Issue (2)
The Three-parameter Unifoldings of Several Kinds of Planar Polycycles with Two Saddle-nodes and One Saddle
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