Taskovski, Dimitar, Vlado Kitanovski, and Sofija Bogdanova. “Web Based Tools for Signals and Systems Course”. International Journal of Online and Biomedical Engineering (iJOE) 5, no. 2 (May 1, 2009): pp. 30–33. Accessed May 3, 2024. https://online-journals.org/index.php/i-joe/article/view/896.