# The CIPM list ‘Recommended values of standard frequencies’: 2021 update

> Research article (Metrologia, 2024) · cited 21× · AI/ML

**Wikidata**: [openalex:W4393971147](https://www.wikidata.org/wiki/openalex:W4393971147)  
**Source**: https://4ort.xyz/entity/the-cipm-list-recommended-values-of-standard-frequencies-2021-update