# HD-NSA: A real-valued negative selection algorithm based on hierarchy division

> Research article (Applied Soft Computing, 2021) · cited 20× · AI/ML

**Wikidata**: [openalex:W3188418946](https://www.wikidata.org/wiki/openalex:W3188418946)  
**Source**: https://4ort.xyz/entity/hd-nsa-a-real-valued-negative-selection-algorithm-based-on-hierarchy-division