# Sergey Firsov
**Wikidata**: [Q4485017](https://www.wikidata.org/wiki/Q4485017)  
**Source**: https://4ort.xyz/entity/sergey-firsov


## References

1. BnF authorities
2. general catalog of BnF
3. Virtual International Authority File
4. Index Theologicus
5. Library of Congress Authorities