- Bardhi, Frang (1641). "Descrittione et informatione del stato del vescouato et chiese parochiali della Diocese Sappatense" (in Latin and English). Propaganda Fide. Archived from the original on 11 September 2009. Retrieved 6 October 2010.
- Mortimer Sellers (4 May 2010). The Rule of Law in Comparative Perspective. Springer. p. 207. ISBN 978-90-481-3748-0. Retrieved 10 May 2012.
Dukagjini's princedom, with Lezha as its own capital city, included Zadrima, the areas in north and northeast of Shkodra and was extended in remote areas of present Serbia, having Ulpiana, near Pristina, as the second capital city.