Torres, Rita, and Paulo Ferreira-Lopes. “Multiphonics As a Compositional Element in Writing for Amplified Guitar (2)”. Journal of Science and Technology of the Arts 4, no. 1 (January 1, 2012): 61-69. Accessed May 12, 2024. https://revistas.ucp.pt/index.php/jsta/article/view/7185.