# Planck constant

> physical constant representing the quantum of action

**Wikidata**: [Q122894](https://www.wikidata.org/wiki/Q122894)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Planck_constant)  
**Source**: https://4ort.xyz/entity/planck-constant


## References

1. [Source](https://lingualibre.org/wiki/Q787987)
2. Freebase Data Dumps. 2013
3. Integrated Authority File
4. [Source](https://www.bipm.org/utils/common/pdf/CGPM-2018/26th-CGPM-Resolutions.pdf)
5. SI Brochure (9th edition): Concise summary
6. Quora
7. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)