# Q102178653

> Ph.D. Universität zu Köln 1992

**Wikidata**: [Q102178653](https://www.wikidata.org/wiki/Q102178653)  
**Source**: https://4ort.xyz/entity/q102178653


## References

1. Mathematics Genealogy Project
2. Catalog of the German National Library
3. Virtual International Authority File
4. Integrated Authority File