@book{6873,
	author = {SESAR Joint Undertaking},
	title = {Delivering the digital European sky},
	publisher = {Publication Office of the European Union,},
	year = {2021},
	address = {Luxembourg :},
	url = {https://op.europa.eu/en/publication-detail/-/publication/cc7b5f87-5d5a-11ec-9c6c-01aa75ed71a1/language-en},
}