Baranenko A. V., Molodcova N. S. (2006). House at the "Five Corners" (from a Commercial College to the University) (in Russian). Saint Petersburg: СПбГУТД. p. 7. ISBN5-7937-0224-5.
The necessary information for arriving in St. Petersburg Commercial College (in Russian). Saint Petersburg: СПбГУНиПТ. 29 May 1890. p. 7.