M. Ali, Aqdas, M. U. Hashmi, Amna Riaz, Rizwana Bibi, and Sidra Siddiqui, “Hybrid-ResEff: A ResNet50-EfficientNetB0 Feature-Fusion Framework for Static Urdu Alphabet Recognition in Pakistan Sign Language”, PPASA, vol. 63, no. 3, Sep. 2026.