^British Intelligence on China in Tibet, 1903-1950 (页面存档备份,存于互联网档案馆), Formerly classified and confidential British intelligence and policy files, Editor: A.J. Farrington, Former Deputy Director, OIOC, British Library, London, IDC Publishers, 2002, p. 22: "A fascinating group of files offers minute detail in an attempt to turn four young Tibetans into a vangard of "modernisers" through the medium of an English public school education."
^ 6.06.1Alastair Lamb. Tom Browns from Central Asia. Alex Mackay (编). The History of Tibet: The modern period : 1895-1959, the encounter with modernity. Routledge. 2003年: 326–327頁.