Potseluev, Evgeny L. “The Views of Nicholas Korkunov, Leon Petrażycki and Pitirim Sorokin on Violation of Law (the Second Half of the 19th — Early 20th Centuries)”. Pravovedenie, vol. 61, no. 6, Dec. 2017, pp. 120-54, https://pravovedenie.spbu.ru/article/view/6317.