# State and unknown input estimation for a class of infinitely unobservable descriptor systems using two observers in cascade

> Research article (Journal of the Franklin Institute, 2017) · cited 17× · AI/ML

**Wikidata**: [openalex:W2762497672](https://www.wikidata.org/wiki/openalex:W2762497672)  
**Source**: https://4ort.xyz/entity/state-and-unknown-input-estimation-for-a-class-of-infinitely-unobservable-descriptor-systems-using-two-observers-in-casc