Volkov, Solomon (2010). “5”. St Petersburg: A Cultural History. New York: Simon and Schuster. p. 337. ISBN9781451603156. https://books.google.com/books?id=6JheQS-7drEC2016年9月15日閲覧. "When St. Petersburg was renamed Petrograd in August 1914 by Nicholas II, it was intended to 'Slavicize' the capital of the empire at war with Germany."