# Non-existence, existence, and uniqueness of limit cycles for a generalization of the Van der Pol–Duffing and the Rayleigh–Duffing oscillators

> Research article (Physica D Nonlinear Phenomena, 2020) · cited 33× · AI/ML

**Wikidata**: [openalex:W3011625429](https://www.wikidata.org/wiki/openalex:W3011625429)  
**Source**: https://4ort.xyz/entity/non-existence-existence-and-uniqueness-of-limit-cycles-for-a-generalization-of-the-van-der-polduffing-and-the-rayleighdu