Bergmann, Georgiĭ Eduardovich: Sarykamyshskai︠a︡ operat︠s︡īi︠a︡, 12-24 dekabri︠a︡ 1914 goda. Ni︠e︡kotorye dokumenty (The Sarikamis operation 12-24 December 1914. Some documents), Paris, 1934: Impr. Pascal.