Hioual, Amel, and Adel Ouannas. “On Fractional Variable-Order Neural Networks With Time-Varying External Inputs”. Innovative Journal of Mathematics (IJM) 1, no. 1 (January 14, 2022): 52–65. Accessed April 25, 2024. https://www.sigmawings.com/journals/index.php/IJM/article/view/5.