# Ondrej Krejcar

> researcher

**Wikidata**: [Q42423581](https://www.wikidata.org/wiki/Q42423581)  
**Source**: https://4ort.xyz/entity/ondrej-krejcar


## References

1. Czech National Authority Database
2. [IS VaVaI](https://api.isvavai.cz/)
3. Virtual International Authority File
4. [Czech National Authority Database](https://aleph.nkp.cz/data/cnb.xml.gz)