Małyszko , Jacek, and Dawid Węckowski. “User Profiling Based on the Identities of Information Sources”. Studia Oeconomica Posnaniensia 5, no. 12 (December 31, 2017): 79–91. Accessed September 3, 2026. https://journals.ue.poznan.pl/soep/article/view/3756.