Sampaio, Paulo Nazareno Maia, Roberto Ivo C. de Freitas, and Gonçalo Nuno P. Cardoso. “Applying Multimedia and Virtual Reality for Learning Environments”. International Journal of Emerging Technologies in Learning (iJET) 4, no. 6 (October 1, 2009): pp. 32–36. Accessed May 2, 2024. https://online-journals.org/index.php/i-jet/article/view/912.