“…Wu JY et al 2017AT-CF-KE 3D, battlefield = -√ ----Ergezer and Leblebicioğlu 2014AT-CF-KE 3D, mountain = ------Çakıcı et al 2016AT-CF-KE 3D, mountain = ------ Sahingoz (2013Sahingoz ( , 2014 AT-CF-KE 2D, obstacle-free = ------Cekmez et al 2016AT-CF-KE 2D, battlefield = ------Li XH et al 2016AT-CF-KE 2D, farmland = ------Li T et al 2016AT-CF-KE 2D, obstacle-free = ------Manyam et al 2017AT-CF-KE 2D, obstacle-free = ------Sørli et al 2017AT-CF-KE 2D, obstacle-free = ------Harounabadi et al 2018AT-CF-KE 2D, obstacle-free = ------Binol et al 2018AT-CF-KE 2D, road network = ------Ning et al 2019AT-CF-KE 2D, battlefield = ------Cho et al 2019AT-CF-KE 2D, obstacle-free ------Zhao M et al 2017AT-CF-KE 3D, battlefield = ----√ -Zhang X et al 2014AT-CF-KE 2D, obstacle-free = ------Qin et al 2018AT-CF-KE 2D, obstacle-free = ------Yang J et al 2018AT-CF-KE 2D, obstacle-free = ------Quintin et al 2017AT-CF-KE 2D, obstacle ------Zhao Z et al 2019AT-CF-KE 3D, obstacle = √ -----Su et al 2016AT-CF-UE 3D, battlefield = √ √ ---- Ma XB et al (2016 AT-DF-KE 3D, urban-like = -√ ----Causa et al 2018AT 2019AT-DF-UE 2D, obstacle √ √ ---- Yang et al (2019aYang et al ( , 2019b AT-HF-KE 2D, obstacle √ ---√ -AT: allocation task; CF: centralized framework; DF: decentralized framework; HF: hybrid framework; KE: known environment; UE: unknown environment. 1: real time; 2: collision avoidance among UAVs; 3: connectivity; 4: formation; 5: synchronicity; 6: heading coordination.…”