# Second-order counterexamples to the discrete-time Kalman conjecture

> Research article (Automatica, 2015) · cited 75× · AI/ML

**Wikidata**: [openalex:W1811601109](https://www.wikidata.org/wiki/openalex:W1811601109)  
**Source**: https://4ort.xyz/entity/second-order-counterexamples-to-the-discrete-time-kalman-conjecture