A. . M. Le, L. . H. Truong, T. . V. Quyen, C. . V. Nguyen, and M. T. N. T. Nguyen, “Wireless Power Transfer Near-field Technologies for Unmanned Aerial Vehicles (UAVs): A Review”, EAI Endorsed Trans Ind Net Intel Syst, vol. 7, no. 22, p. e5, Jan. 2020.