Hybrid Contrastive Learning With Attention-Based Neural Networks for Robust Fraud Detection in Digital Payment Systems. - Md Shahin Alam Mozumder; Mohammad Balayet Hossain Sakil; Md Rokibul Hasan; Md Amit Hasan 002; K. M. Nafiur Rahman Fuad; M. F. Mridha 001; Md. Rashedul Islam; Yutaka Watanobe (IEEE Open J. Comput. Soc., 2025)