NELSON, Peter. “György Ligeti, Friction, and the Uncertain Image”. Studia Universitatis Babeş-Bolyai Musica 69, no. Special Issue 2 (July 30, 2024): 37–46. Accessed April 3, 2025. https://studia.reviste.ubbcluj.ro/index.php/subbmusica/article/view/7455.