Heterogeneous Graph Network (HGN) for Binary Spatio-Chemical-Source Classification of Per- and Polyfluoroalkyl Substances (PFAS) Contamination: An Optimized Approach. - Alain Bertrand Bomgni; Wilfried Loic Dnjomou Yonmba; Ribot Fleury Téné Ceskoutsé; Nick Klein; Venkataramana Gadhamshetty; Etienne Gnimpieba Zohim (BIBM, 2025)