# Piotr Sobolczyk
**Wikidata**: [Q11818078](https://www.wikidata.org/wiki/Q11818078)  
**Source**: https://4ort.xyz/entity/piotr-sobolczyk


## References

1. [BnF authorities](https://catalogue.bnf.fr/ark:/12148/cb15872134r)
2. general catalog of BnF
3. Virtual International Authority File
4. Library of Congress Authorities