Nachtigal, Gustav (1971) Sahara and Sudan: Wadai and Darfur (Volume 4 of Sahara and Sudan) Hurst, London, page 413, OCLC27836995
Amery, Harold François Saphir (1905) English-Arabic vocabulary for the use of officials in the Anglo-Egyptian Sudan Intelligence Department, Egyptian Ministry of War, Al-Mokattam Printing Office, Cairo, page 435, OCLC7582223
Johnson, Amy J. (2004) Reconstructing Rural Egypt: Ahmed Hussein and the history of Egyptian development Syracuse University Press, Syracuse, New York, page 281, ISBN 0-8156-3014-X
Salmoni, Barak A.; Loidolt, Bryce and Wells, Madeleine (2010) Regime and periphery in Northern Yemen: the Huthi phenomenon (Rand Corporation monograph series, MG-962-DIA) Rand Corporation, Santa Monica, California, pages 81-82, ISBN 978-0-8330-4933-9
worldcat.org
Nachtigal, Gustav (1971) Sahara and Sudan: Wadai and Darfur (Volume 4 of Sahara and Sudan) Hurst, London, page 413, OCLC27836995
Amery, Harold François Saphir (1905) English-Arabic vocabulary for the use of officials in the Anglo-Egyptian Sudan Intelligence Department, Egyptian Ministry of War, Al-Mokattam Printing Office, Cairo, page 435, OCLC7582223
