(en) Sherry B. Ortner, High Religion : A Cultural and Political History of Sherpa Buddhism, Motilal Banarsidass Publ., , 245 p. (lire en ligne), p. 4 : « Institutionally, the Modern Sherpas are an ethnically Tibetan group living at high altitudes (between about 8,500 and 14,500 feet) in the Himalayan mountains of northeast Nepal. ([...] the Sherpas constitute one of many ethnic minorites within [Nepal]). They are thought to have migrated from Kham, in northeast Tibet, in the late fifteenth and early sixteenth centuries. »
(en) Peter Gillman et Leni Gillman, Everest : eighty years of triumph and tragedy, The Mountaineers Books, , 240 p. (ISBN0-89886-780-0, lire en ligne), p. 205
