Playfair 1954, p. 210. Playfair, I. S. O.; Stitt, G. M. S.; Molony, C. J. C. & Toomer, S. E. (1954). Butler, J. R. M. (ed.). The Mediterranean and Middle East: The Early Successes Against Italy (to May 1941). History of the Second World War, United Kingdom Military Series. Vol. I. OCLC494123451.
Playfair 1954, p. 266. Playfair, I. S. O.; Stitt, G. M. S.; Molony, C. J. C. & Toomer, S. E. (1954). Butler, J. R. M. (ed.). The Mediterranean and Middle East: The Early Successes Against Italy (to May 1941). History of the Second World War, United Kingdom Military Series. Vol. I. OCLC494123451.
Montanari 1985, pp. 204, 306. Montanari, Mario (1985). Sidi el Barrani (giugno 1940 – febbraio 1941) [Sidi Barrani (June 1940 – February 1941)]. Le Operazioni in Africa Settentrionale (in Italian). Vol. I. Roma: Ufficio Storico dello Stato Maggiore Esercito. OCLC868634287.
Playfair 1954, pp. 267–268. Playfair, I. S. O.; Stitt, G. M. S.; Molony, C. J. C. & Toomer, S. E. (1954). Butler, J. R. M. (ed.). The Mediterranean and Middle East: The Early Successes Against Italy (to May 1941). History of the Second World War, United Kingdom Military Series. Vol. I. OCLC494123451.
Playfair 1954, pp. 266–268. Playfair, I. S. O.; Stitt, G. M. S.; Molony, C. J. C. & Toomer, S. E. (1954). Butler, J. R. M. (ed.). The Mediterranean and Middle East: The Early Successes Against Italy (to May 1941). History of the Second World War, United Kingdom Military Series. Vol. I. OCLC494123451.
IOH 1979, I Annex 32. La prima offensiva britannica in Africa settentrionale (ottobre 1940 – febbraio 1941) [The First British Offensive in North Africa (October 1940 – February 1941) I. annexe 32] (in Italian). Roma: Esercito. Corpo di stato maggiore. Ufficio storico. 1979. OCLC6863876.