Mustaffa, M. et al. 2018. 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 & Technology. 7, 4.25 (Nov. 2018), 1–4. DOI:https://doi.org/10.14419/ijet.v7i4.25.22238.