# The two ∇6R4 type invariants and their higher order generalisation

> Research article (Journal of High Energy Physics, 2015) · cited 30× · AI/ML

**Wikidata**: [openalex:W2044098535](https://www.wikidata.org/wiki/openalex:W2044098535)  
**Source**: https://4ort.xyz/entity/the-two-6r4-type-invariants-and-their-higher-order-generalisation