"Oettingen 1". genealogy.euweb.cz. Retrieved April 6, 2020.
worldcat.org
search.worldcat.org
Treptow, Kurt W., ed. (1991). Dracula : essays on the life and times of Vlad ČšepeČ™. Boulder, Colo.: East European Monographs. ISBN0-88033-220-4. OCLC24689405.