Lilie, Ralph-Johannes; Ludwig, Claudia; Pratsch, Thomas; Zielke, Beate (2000). "Muḥammad ibn Marwān (# 5189)". Prosopographie der mittelbyzantinischen Zeit: 1. Abteilung (641–867), Band 3: Leon (# 4271) – Placentius (# 6265) (in German). Berlin and Boston: De Gruyter. pp. 322–323. ISBN978-3-11-016673-6.
Halbertsma, Herrius (1982). "Summary". Frieslands Oudheid(PDF) (Thesis) (in Dutch). Groningen: Rijksuniversiteit Groningen. pp. 791–798. OCLC746889526. Archived from the original(PDF) on October 1, 2013. Retrieved April 17, 2010.
Halbertsma, Herrius (1982). "Summary". Frieslands Oudheid(PDF) (Thesis) (in Dutch). Groningen: Rijksuniversiteit Groningen. pp. 791–798. OCLC746889526. Archived from the original(PDF) on October 1, 2013. Retrieved April 17, 2010.
Halbertsma, Herrius (1982). "Summary". Frieslands Oudheid(PDF) (Thesis) (in Dutch). Groningen: Rijksuniversiteit Groningen. pp. 791–798. OCLC746889526. Archived from the original(PDF) on October 1, 2013. Retrieved April 17, 2010.