# Sipke D. Fokkema

> Ph.D. Vrije Universiteit Amsterdam 1954

**Wikidata**: [Q102315433](https://www.wikidata.org/wiki/Q102315433)  
**Source**: https://4ort.xyz/entity/sipke-d-fokkema


## References

1. Mathematics Genealogy Project
2. Integrated Authority File
3. Virtual International Authority File
4. CiNii Research
5. Dutch National Thesaurus for Author Names