Moshe Sharon: Corpus Inscriptionum Arabicarum Palaestinae (CIAP), Volume Two: B-C. Brill Academic Publishing, 1998, ISBN 978-90-04-11083-0, S.172 (google.com [abgerufen am 3. Januar 2015]).
Robert S. Kramer, Richard A. Lobban Jr., Carolyn Fluehr-Lobban: Historical Dictionary of the Sudan (= Historical Dictionaries of Africa). 4. Auflage. Scarecrow Press, an imprint of Rowman & Littlefield, Lanham, Maryland, USA 2013, ISBN 978-0-8108-6180-0, S.361 (google.com [abgerufen am 2. Mai 2015]): „QUBBA. The Arabic name for the tomb of a holy man... A qubba is usually erected over the grave of a holy man identified variously as wali (saint), faki, or shaykh since, according to folk Islam, this is where his baraka [blessings] is believed to be strongest...“
Vali Nasr: The Shia Revival: How Conflicts within Islam Will Shape the Future. W. W. Norton & Company, 2007, ISBN 978-0-393-06640-1, S. 97; Loring M. Danforth: Crossing the Kingdom: Portraits of Saudi Arabia. Univ. of California Press, 2016, ISBN 978-0-520-29028-0, S.163 (google.co.uk).
