@inbook {Sommer 1980,
	title = {Predigt zur Vesper in der Kart{\"a}userkirche K{\"o}ln},
	booktitle = {Hermann Josef Roth (ed.), Geschichte und Kultur der Kart{\"a}user. Tagung am 21. und 22. Oktober 1979 in K{\"o}ln},
	series = {Cistercienser Chronik},
	number = {87:1},
	year = {1980},
	note = {<a href="http://www.cartusiana.org/sites/default/files/Roth_Geschichte\%20und\%20Kultur\%20der\%20Kart\%C3\%A4user_02.pdf$\#$page=14">Elektronisch raadpleegbaar</a>.},
	pages = {40-42},
	address = {Bregenz},
	keywords = {K{\"o}ln O.Cart. (officium ad vesperas), liturgia, officia},
	author = {Sommer , Rainer}
}
