XAI for Fraud Detection: An Attention-Based Ensemble of CNNs, GNNs, and Confidence-Driven Gating for Reliable Decision-Making. - Mehdi Hosseini Chagahi; Abolfazl Yekaneh; Saeed Mohammadi Dashtaki; Behzad Moshiri; Md. Jalil Piran (IEEE Trans. Inf. Forensics Secur., 2026)