Kennedy, Hugh (2000). Crusader Castles. Cambridge University Press. ISBN 0-521-79913-9.
Foss, Clive (1986). Byzantine fortifications an introduction. Univ. of South Africa. ISBN 0869813218. OCLC 254999395.
Nicolle, David (2008). Crusader Castles in the Holy Land: An Illustrated History of the Crusader Fortifications of the Middle East and Mediterranean. ISBN 978-1846033490.
Reginald Allen Brown (1989). Castles from the air. Cambridge University Press. ISBN 978-0-521-32932-3.