Jansen, Peter-Erwin. “Marcuse I Heidegger: Notes biogràfiques a Partir De l’epistolari”. Enrahonar. An international journal of theoretical and practical reason 62 (March 7, 2019): 21–38. Accessed April 7, 2025. https://revistes.uab.cat/enrahonar/article/view/v62-jansen.