# Action principle selection of regular black holes

> Research article (Physical review. D/Physical review. D., 2021) · cited 30× · AI/ML

**Wikidata**: [openalex:W3157823833](https://www.wikidata.org/wiki/openalex:W3157823833)  
**Source**: https://4ort.xyz/entity/action-principle-selection-of-regular-black-holes