FERARU, Tudor. “INNOVATIVE SOUND EFFECTS AND ELEMENTS OF MUSIC NOTATION IN GEORGE CRUMB’S ‘BLACK ANGELS’ FOR ELECTRIC STRING QUARTET”. Studia Universitatis Babes-Bolyai Musica 58, no. 2 (December 30, 2013): 65–72. Accessed January 18, 2026. https://studia.reviste.ubbcluj.ro/index.php/subbmusica/article/view/8843.