@article {Li2024b,
	title = {3D Circle Formation Control of VTOL Vehicles Without Distance Measurement},
	journal = {IEEE Transactions on Intelligent Vehicles},
	volume = {9},
	number = {2},
	year = {2024},
	month = {feb},
	pages = {3305{\textendash}3315},
	publisher = {IEEE},
	issn = {2379-8904},
	doi = {10.1109/TIV.2023.3340875},
	url = {https://ieeexplore.ieee.org/document/10349938/},
	author = {Li, Shuai and Chen Wang and Xie, Guangming}
}
