# Rolf A. de By

> Ph.D. Universiteit Twente 1991

**Wikidata**: [Q102273038](https://www.wikidata.org/wiki/Q102273038)  
**Source**: https://4ort.xyz/entity/rolf-a-de-by


## References

1. IdRef
2. Mathematics Genealogy Project
3. [ORCID Public Data File 2020](https://pub.orcid.org/v3.0_rc1/0000-0002-8921-2960/employment/6780862)
4. Virtual International Authority File
5. [Source](https://librarian.nl.go.kr/LI/contents/L20101000000.do?id=KAC201001934)
6. Dutch National Thesaurus for Author Names
7. National Library of Israel Names and Subjects Authority File