# Roland Häggkvist

> Ph.D. from Umeå University in 1977 on "On Factors and Cycles in Graphs and Digraphs" supervised by Hans Einar Wallin

**Wikidata**: [Q101072634](https://www.wikidata.org/wiki/Q101072634)  
**Source**: https://4ort.xyz/entity/roland-h-ggkvist


## References

1. Virtual International Authority File
2. Mathematics Genealogy Project
3. Czech National Authority Database
4. Catalog of the German National Library
5. [Source](http://bnb.data.bl.uk/id/person/H%C3%A4ggkvistRoland1950-)
6. NUKAT
7. [Source](https://www.genealogy.math.ndsu.nodak.edu/id.php?id=20458)
8. [Source](https://zbmath.org/authors/?q=ai:haggkvist.roland)
9. [Source](https://owpdb.mfo.de/person_detail?id=7743)