# Jacek Kowalski

> Polish singer

**Wikidata**: [Q782131](https://www.wikidata.org/wiki/Q782131)  
**Source**: https://4ort.xyz/entity/jacek-kowalski


## References

1. BnF authorities
2. Czech National Authority Database
3. general catalog of BnF
4. Virtual International Authority File
5. CiNii Research
6. MusicBrainz
7. Polish Science
8. NUKAT
9. Sejm-Wielki.pl