Mustaffa, Masnawi, et al. “Preliminary Study on Air Traffic Density of Peninsular Malaysia Using Visual Flight Path Trajectories from Automatic Dependent Surveillance-Broadcast (ADS-B) Data”.
International Journal of Engineering and Technology, vol. 7, no. 4.25, Nov. 2018, pp. 1-4,
https://doi.org/10.14419/ijet.v7i4.25.22238.