# PMU-Based Estimation of Synchronous Machines’ Unknown Inputs Using a Nonlinear Extended Recursive Three-Step Smoother

> Research article (IEEE Access, 2018) · cited 11× · AI/ML

**Wikidata**: [openalex:W2895722594](https://www.wikidata.org/wiki/openalex:W2895722594)  
**Source**: https://4ort.xyz/entity/pmu-based-estimation-of-synchronous-machines-unknown-inputs-using-a-nonlinear-extended-recursive-three-step-smoother