@journal {10.17437/NDV2104, 
	title = "NDV - Nachrichtendienst 04/2021",
	journal = "NDV - Nachrichtendienst",
	ISSN = "0012-1185",
	year = "2021",
	number = "4",
	doi = "10.17437/NDV2104",
	url = "https://content-select.com/index.php?id=bib_view&doi=10.17437%2FNDV2104",
	publisher = "Lambertus Verlag",
	language = "",
}