1. Yuan, X., Zhu, B.: Survey on modeling and control of quadrotor UAV-slung load system. The Seventh Research Division, School of Automation Science and Electrical Engineering
2. Villa, D.K.D., Brandao, A.S., Sarcinelli-Filho, M.: A survey on load transportation using multirotor UAVs. J. Intell. Rob. Syst. 98, 267–296 (2020)
3. Juntong, Q.I., Yuan, P.: Survey on flight control technology for hanging load UAV. Unmanned Syst. Technol. 1(01) (2018)
4. Yuan, C.: Flight Dynamics Modeling Coupling Investigation of a Helicopter Suspended by a Slung Load. Nanjing University of Science Technology, China
5. Liu, L., Chen, M., Li, T.: Disturbance observer-based robust coordination control for unmanned autonomous helicopter slung-load system via coupling analysis method. Appl. Math. Comput. 427, 127148 (2022)