A. Radwan, M. Soliman, O. Abdelaziz, A. Abdel-Qader, and M. S. Shehata, “MoE^2: A Mixture-of-Mixtures of Experts for Ensemble-Free Domain Generalization”, AAAI, vol. 40, no. 30, pp. 25047–25055, Mar. 2026.