Dorling, K., Heinrichs, J., Messier, G. G., & Magierowski, S. (2017). Vehicle routing problems for drone delivery. IEEE Transactions on Systems, Man, and Cybernetics: Systems, 47(1), 70-85.
 C. C. Murray and A. G. Chu, “The flying sidekick traveling salesman problem: Optimization of drone-assisted parcel delivery,” Transp. Res. Emerging Technol., vol. 54, pp. 86–109, May 2015.
 K. Sundar and S. Rathinam, “Algorithms for routing an unmanned aerial vehicle in the presence of refueling depots,” IEEE Trans. Autom. Sci.Eng., vol. 11, no. 1, pp. 287–294, Jan. 2014.
 Wang, Xingyin, Stefan Poikonen, and Bruce Golden. "The vehicle routing problem with drones: Several worst-case results." Optimization Letters 11.4 (2017): 679-697.
 Wackwitz, Kay, and Hendrick Boedecker. "Safety Risk Assessment for UAV Operation." Drone Industry Insights, Safe Airspace Integration Project, Part One, Hamburg, Germany (2015).
 Ferrandez, Sergio Mourelo, et al. "Optimization of a truck-drone in tandem delivery network using k-means and genetic algorithm." Journal of Industrial Engineering and Management 9.2 (2016): 374.
 Chen, Chen, Y., Zhao, X., & Han, J. (2010). Review of 3D path planning methods for mobile robot. Robot, 32, 568–576.
 Berry, A., Howitt, J., Gu, D.-W., & Postlethwaite, I. (2010). Enabling the operation of multiple micro-air-vehicles in increasingly complex obstacle-rich environments. In J. Rankin (Ed.), AIAA [email protected]
Aerospace 2010, Atlanta, Georgia (p. 1–14). Reston, VA: American Institute of Aeronautics and Astronautics Inc..
 Srikanthakumar, S., Liu, C., & Chen, W.H. (2012). Optimizationbased safety analysis of obstacle avoidance systems for unmanned aerial vehicles. Journal of Intelligent & Robotic Systems, 65(1–4), 219–231.
 Oland, Espen, & Kristiansen, Raymond. (2013). Collision and terrain avoidance for UAVs using the potential field method. In IEEE Aerospace Conference (pp. 1–7). Washington, DC: IEEE Computer Society.
 Koren, Y., & Borenstein, J. (1991). Potential field methods and their inherent limitations for mobile robot navigation. In Proceedings of the IEEE International Conference on Robotics and Automation (pp. 1398–1404). Piscataway, NJ: IEEE.
 Y.-b. Chen, G.-c. Luo, Y.-s. Mei, J.-q. Yu, and X.-l. Su, “UAV path planning using artificial potential field method updated by optimal control theory,” International Journal of Systems Science. Principles and Applications of Systems and Integration, vol. 47, no. 6, pp. 1407–1420, 2016
 Lee, Jaihyun. "Optimization of a modular drone delivery system." Systems Conference (SysCon), 2017 Annual IEEE International. IEEE, 2017.
 K. Dorling, J. Heinrichs, G. G. Messier, and S. Magierowski, “Vehicle Routing Problem for Drone Delivery”, IEEE Transactions on System Man and Cybernetic: Systems, 2016.