# Approximation-Free State-Feedback Backstepping Controller for Uncertain Pure-Feedback Nonautonomous Nonlinear Systems Based on Time-Derivative Estimator

> Research article (IEEE Access, 2019) · cited 10× · AI/ML

**Wikidata**: [openalex:W2970751599](https://www.wikidata.org/wiki/openalex:W2970751599)  
**Source**: https://4ort.xyz/entity/approximation-free-state-feedback-backstepping-controller-for-uncertain-pure-feedback-nonautonomous-nonlinear-systems-ba