# The approximation number function and the characterization of covering approximation space

> Research article (Information Sciences, 2015) · cited 11× · AI/ML

**Wikidata**: [openalex:W1965687345](https://www.wikidata.org/wiki/openalex:W1965687345)  
**Source**: https://4ort.xyz/entity/the-approximation-number-function-and-the-characterization-of-covering-approximation-space