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- [7] THE NON-EXISTENCE OF LIMIT-CYCLE OF SOME QUADRATIC DIFFERENTIAL SYSTEM CHINESE ANNALS OF MATHEMATICS SERIES B, 1982, 3 (06): : 721 - 724
- [10] AN IMPROVEMENT OF THE NON-EXISTENCE REGION FOR LIMIT CYCLES OF THE BOGDANOV-TAKENS SYSTEM ARCHIVUM MATHEMATICUM, 2020, 56 (04): : 199 - 206