William Henry Chamberlin, Hoover Institution on War, Revolution, and Peace, Ohio State University (1960). Michael Karpovich, Dimitri Sergius Von Mohrenschildt, red. The Russian review, Volume 19. Blackwell. s. 115. Besøkt 31. oktober 2010.CS1-vedlikehold: Flere navn: forfatterliste (link)(Original from the University of Michigan)
Tolstaya, S.A. The Diaries of Sophia Tolstoy, Book Sales, 1987; Chertkov, V. "The Last Days of Leo Tolstoy," http://www.linguadex.com/tolstoy/index.html, translated by Benjamin Scher