Amira A. Mahmoud, Sarah M. Alhammad, Yasser Fouad, Ahmed M. Osman, Hazem M. El-Bakry, Ahmed M. Elshewey. "Air quality prediction via hybrid BiGRU-MLP using binary ant colony optimization and firefly algorithm for hyperparameter tuning." Scientific Reports (2026). https://doi.org/10.1038/s41598-026-57938-9