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- [4] Periodic solutions of Lienard equations with asymmetric nonlinearities at resonance JOURNAL OF THE LONDON MATHEMATICAL SOCIETY-SECOND SERIES, 2003, 68 : 119 - 132
- [5] Coexistence of unbounded solutions and periodic solutions of Lienard equations with asymmetric nonlinearities at resonance SCIENCE IN CHINA SERIES A-MATHEMATICS, 2007, 50 (08): : 1205 - 1216
- [7] Coexistence of unbounded solutions and periodic solutions of Liénard equations with asymmetric nonlinearities at resonance Science in China Series A: Mathematics, 2007, 50 : 1205 - 1216