# Observers and observability for uncertain nonlinear systems: A necessary and sufficient condition

> Research article (International Journal of Robust and Nonlinear Control, 2019) · cited 20× · AI/ML

**Wikidata**: [openalex:W2924257743](https://www.wikidata.org/wiki/openalex:W2924257743)  
**Source**: https://4ort.xyz/entity/observers-and-observability-for-uncertain-nonlinear-systems-a-necessary-and-sufficient-condition