Limit cycles for a quadratic system with an invariant straight line and some evolution of phase portraits, in "Qualitative Theory of Differential Equations"

B. Coll, J. Llibre

Research output: Contribution to journalArticleResearch

Original languageEnglish
Pages (from-to)111-123
JournalColloquia mathematica Societatis János Bolyai
Volume53
Publication statusPublished - 1 Jan 1988

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