Universiteti Shtetëror i Tiranës. Instituti i Historisë dhe i Gjuhësisë. Sektori i Etnografisë; Akademia e Shkencave e RPSH. Instituti i Historisë. Sektori i Etnografisë: Etnografia shqiptare. Akademia e Shkencave e RPSH, Instituti i Historisë, Sektori i Etnografisë, 1962, S.32 (google.com [abgerufen am 10. Mai 2012]).
Mortimer Sellers: The Rule of Law in Comparative Perspective. Springer, 2010, ISBN 978-90-481-3748-0, S.207 (google.com [abgerufen am 10. Mai 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.“
google.de
books.google.de
Christian Zindel, Andreas Lippert, Bashkim Lahi, Machiel Kiel: Albanien: Ein Archäologie- und Kunstführer von der Steinzeit bis ins 19. Jahrhundert. Böhlau Verlag GmbH, Wien 2018, S.509 (Online-Vorschau in der Google-Buchsuche).
