EEG-Based Multi-Level Mental State Classification Using Partial Directed Coherence and Graph Convolutional Networks: Impact of Binaural Beats on Stress Mitigation. - Yara Badr; Fares Al-Shargie; Malik Nasir Afzal Khan; Nour Faris Ali; Usman Tariq; Fadwa Al-Mughairbi; Fabio Babiloni; Hasan Al-Nashash (IEEE Access, 2025)