Beryl J. Williams. The Strategic Background to the Anglo-Russian Entente of August 1907. „The Historical Journal”. 9 (03), s. 360–373, 1966. DOI: 10.1017/S0018246X00026698.
D.A. Low. The Government of India and the First Non-Cooperation Movement – 1920–1922. „The Journal of Asian Studies”. 25 (2), s. 241–259, luty 1966. DOI: 10.2307/2051326.