# Dirk Puetzfeld

> Ph.D. Universität zu Köln 2003

**Wikidata**: [Q102312622](https://www.wikidata.org/wiki/Q102312622)  
**Source**: https://4ort.xyz/entity/dirk-puetzfeld


## References

1. Integrated Authority File
2. Mathematics Genealogy Project
3. Virtual International Authority File
4. [Source](http://mak.bn.org.pl/cgi-bin/KHW/makwww.exe?BM=1&NU=1&IM=4&WI=9810537639105606)