“Development of an Optimized Hybrid XGBoost–GRU Model for Detection of Ponzi Schemes in Ethereum Transaction Networks”. FUDMA Journal of Engineering and Technology 1, no. 2 (November 15, 2025): 685–691. Accessed March 14, 2026. https://fjet.fudutsinma.edu.ng/index.php/fjet/article/view/87.