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Complex dynamics of a simple epidemic model with a nonlinear incidence
| 1. | Science College, Air Force Engineering University, Xi'an 710051, China |
| 2. | Department of Mathematics, Xi'an Jiaotong University, Xi'an, 710049 |
| 3. | Department of Mathematics and Statistics, York University, Toronto, Ontario M3J 1P3 |
| 4. | Department of Mathematics, Xi’an Jiaotong University, Xi’an, 710049, China |
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