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POINCARE BIFURCATION FOR QUADRATIC SYSTEMS WITH A CENTER REGION AND AN UNBOUNDED TRIANGULAR REGION |
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| Authors: | Gang Jiatai Dong Xiangyu Shen Boqian |
| Institution: | [1]University Key Lab of Information Sciences and Engineering, Dalian University, Dalian 116622 [2]Dept. of Math., Liaoning Normal University, Dalian 116029 |
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