# An internal model approach to estimation of systems with arbitrary unknown inputs

> Research article (Automatica, 2019) · cited 44× · AI/ML

**Wikidata**: [openalex:W2962255320](https://www.wikidata.org/wiki/openalex:W2962255320)  
**Source**: https://4ort.xyz/entity/an-internal-model-approach-to-estimation-of-systems-with-arbitrary-unknown-inputs