# States on systems of sets that are closed under symmetric difference

> Research article (Mathematische Nachrichten, 2015) · cited 17× · AI/ML

**Wikidata**: [openalex:W1522042232](https://www.wikidata.org/wiki/openalex:W1522042232)  
**Source**: https://4ort.xyz/entity/states-on-systems-of-sets-that-are-closed-under-symmetric-difference