# Paul Willem Peter Johan Grefen

> Ph.D. Universiteit Twente 1992

**Wikidata**: [Q102273040](https://www.wikidata.org/wiki/Q102273040)  
**Source**: https://4ort.xyz/entity/paul-willem-peter-johan-grefen


## References

1. Integrated Authority File
2. Mathematics Genealogy Project
3. National Library of Israel Names and Subjects Authority File