PrzewłokaA. “Security Services Thwarts Attempts to Establish Catholic Intelligentsia Club in Katowice from 1956 to 1957”. Śląskie Studia Historyczno-Teologiczne, Vol. 43, no. 1, June 2010, pp. 124–136, https://journals.us.edu.pl/index.php/ssht/article/view/16684.