Tcherbakova, I. V., and V. A. Yadov. ’The Culture of Helping Behavior in the City: Video Research in Subway Passengers of Budapest, Moscow, Nizhny Novgorod, and St. Petersburg’. Sotsiologicheskiy Zhurnal = Sociological Journal, no. 4, Mar. 2007, pp. С. 138-48, https://www.journal-socjournal.ru/index.php/socjour/article/view/975.