References
- General references
- "Lucky Matthias". Frisian Round Table 1 (2). 1977.
- Steffen, Uwe (2004). Matthias der Glückliche und seine Zeit (in German). Bredstedt. ISBN 3-88007-316-3.
- Citations
Read more about this topic: Matthias Petersen
References
Read more about this topic: Matthias Petersen