# Kalle Virtanen

> Finnish mathematician (1921-2006)

**Wikidata**: [Q18662892](https://www.wikidata.org/wiki/Q18662892)  
**Source**: https://4ort.xyz/entity/kalle-virtanen


## References

1. BiographySampo
2. The National Biography of Finland
3. Czech National Authority Database
4. Mathematics Genealogy Project
5. Virtual International Authority File
6. Uppslagsverket Finland
7. IdRef
8. National Library of Israel Names and Subjects Authority File