@inbook {Bl{\"u}m 1991,
	title = {Die Kart{\"a}userliturgie um 1500},
	booktitle = {Werner Sch{\"a}fke (ed.), Die K{\"o}lner Kartause um 1500. Eine Reise in unsere Vergangenheit},
	year = {1991},
	pages = {241-251},
	address = {K{\"o}ln},
	keywords = {liturgia},
	author = {Bl{\"u}m, Hubertus Maria}
}
