* {{citeCite book|last=Brand|first=Charles M.|title=Byzantium Confronts the West, 1180–1204|location=Cambridge, Massachusetts|publisher=Harvard University Press|year=1968|url=http://quod.lib.umich.edu/cgi/t/text/text-idx?c=acls;idno=heb02893|chapter=The Norman Threat: 1185|pages=160–175}}
* {{citeCite book|editor-last=Magoulias|editor-first=Harry J.|title=O City of Byzantium. Annals of Niketas Choniates|location=Detroit|publisher=Wayne State University Press|year=1984|id=ISBN 0-8143-1764-2}}
* {{citeCite book|last=Stephenson|first=Paul|title=Byzantium's Balkan Frontier: A Political Study of the Northern Balkans, 900–1204|location=Cambridge, United Kingdom|publisher=Cambridge University Press|year=2000|id=ISBN 0-521-77017-3|url=https://books.google.com/books?id=ILiOI0UgxHoC|chapter=The Norman Invasion, 1185–1186|pages=284–288}}
