Franc, Martin, and Jiří Knapík. “Leisure Time 1957−1967: Contemporary Discussions and Defi Nitions”. Dějiny – teorie – kritika, no. 1 (July 1, 2012): 33–68. Accessed July 4, 2025. https://www.ojs.cuni.cz/dejinyteoriekritika/article/view/2617.