# Willem Kapteyn

> university teacher from the Netherlands

**Wikidata**: [Q15854599](https://www.wikidata.org/wiki/Q15854599)  
**Source**: https://4ort.xyz/entity/willem-kapteyn


## References

1. Catalogus Professorum Academiae Rheno-Traiectinae
2. Onze Hoogleeraren
3. [Mathematics Genealogy Project](http://www.genealogy.ams.org/id.php?id=51358)
4. [Mathematics Genealogy Project](http://www.genealogy.ams.org/id.php?id=113619)
5. [Mathematics Genealogy Project](http://www.genealogy.ams.org/id.php?id=51391)
6. Mathematics Genealogy Project
7. Virtual International Authority File
8. Willem Kapteyn. Biografisch Portaal
9. KNAW Past Members