# Ján Čierny
**Wikidata**: [Q104761760](https://www.wikidata.org/wiki/Q104761760)  
**Source**: https://4ort.xyz/entity/j-n-ierny


## References

1. Virtual International Authority File
2. BnF authorities
3. NUKAT
4. CiNii Research
5. Czech National Authority Database
6. MAK
7. Bibliography of the History of the Czech Lands
8. [Source](http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&NU=1&IM=4&WI=9810672305905606)
9. VcBA (identifier)
10. Regional Database of the Central Bohemian Research Library in Kladno