Syahputra, M.Efaldes, Toto Indriyanto, and Javensius Sembiring. 2026. “Data-Driven Trajectory Optimization on the Cgk–upg Route Using K-Means and Bluesky Stochastic Simulation”. Indonesian Journal of Aerospace 23 (2):177-92. https://doi.org/10.55981/ijoa.2025.14365.