Booth, Martin (2001) [2000]. „Rhythms of Rapture” (trade paperback). A Magick Life: A Biography of Aleister Crowley (Coronet izd.). London: Hodder and Stoughton. str. 152–157. ISBN0-340-71806-4.
Muza, SR; Fulco, CS; Cymerman, A (2004). „Altitude Acclimatisation Guide.”. US Army Research Inst. of Environmental Medicine Thermal and Mountain Medicine Division Technical Report (USARIEM-TN-04-05). Arhivirano iz originala na datum 2009-04-23. Pristupljeno 2009-03-05.
Muza, SR; Fulco, CS; Cymerman, A (2004). „Altitude Acclimatisation Guide.”. US Army Research Inst. of Environmental Medicine Thermal and Mountain Medicine Division Technical Report (USARIEM-TN-04-05). Arhivirano iz originala na datum 2009-04-23. Pristupljeno 2009-03-05.