Heryati, Agustina, et al. “Optimization of Cement Distribution Route Based on Hybrid Genetic-Firefly Algorithm (GAFA)”. Indonesian Journal of Electrical Engineering and Informatics (IJEEI), vol. 13, no. 4, Dec. 2025, pp. 981-95, https://doi.org/10.52549/ijeei.v13i4.6404.