# Sigma function in observer design for states and perturbations

> Research article (Automation and Remote Control, 2016) · cited 32× · AI/ML

**Wikidata**: [openalex:W2511012658](https://www.wikidata.org/wiki/openalex:W2511012658)  
**Source**: https://4ort.xyz/entity/sigma-function-in-observer-design-for-states-and-perturbations