Amato, Daniel Chris, and Cynthia Yukiko Hirago. “Per Cantum: A Digital Tool for the Teaching of Virtual Choir in E- Learning”. Revista Hipótese 8, no. esp1 (December 1, 2021): e022021. Accessed July 9, 2026. https://revistahipotese.editoraiberoamericana.com/revista/article/view/416.