Federer, Lucas. “Internationalism and Realpolitik Between the Blocs. The Trotskyist Movement in Switzerland During the 1950s and 1960s”. The International Newsletter of Communist Studies00 (July 24, 2017): 33-34. Accessed February 23, 2020. https://incs.ub.rub.de/index.php/INCS/article/view/699.