1. IATA (2022), The Importance of Air Transport to Malaysia. International Air Transport Association, 1-4.
2. Fan, B., Li, Y., Zhang, R., & Fu, Q. (2020). Review on the technological development and application of UAV systems. Chinese Journal of Electronics, 29(2), 199-207.
3. Kille, T., Bates, P. R., Lee, S. Y., & Kille, D. M. (2019). The future for civilian UAV operations. In Unmanned Aerial Vehicles in Civilian Logistics and Supply Chain Management (pp. 266-283). IGI Global.
4. Dean Takahashi (2021), UPS uses Matternet drones to deliver COVID-19 vaccines, Venture Beat, 24 Aug. 2021, https://venturebeat.com/2021/08/24/ups-uses-matternet-drones-to-deliver-covid-19-vaccines/
5. DHL Express Malaysia And Pen Aviation Signs MoU For Cargo Drone Delivery (2021), press realease, Kuala Lumpur 20 Aug 2021. https://www.dhl.com/my-en/home/press/press-archive/2021/dhl-express-malaysia-and-pen-aviation-signs-mou-for-cargo-drone-delivery.html#:~:text=Under%20this%20agreement%2C%20DHL%20and,in%20partnership%20with%20Cavok%2DUAS.