Ahmed, Kawser, Milca de Freitas Coelho, and Kouamana Bousson. “Optimal Fuel Saving in 4D Waypoint Networks”. KnE Engineering 5, no. 6 (June 2, 2020): 500–513. Accessed April 26, 2024. https://knepublishing.com/index.php/KnE-Engineering/article/view/7065.