@inbook {Nissen 1999, title = {Signum contemplationis: history and revision of the Carthusian liturgy}, booktitle = {James Hogg (ed.), Die Kart{\"a}user und das Heilige R{\"o}mische Reich. Internationaler Kongress vom 9.-11. September 1997, Bezirksklinikum in der Kartause Pr{\"u}ll}, series = {Analecta Cartusiana}, volume = {2}, number = {140:2}, year = {1999}, note = {Oorspronkelijk verschenen in het Nederlands: Nissen 1993.}, pages = {89-104}, address = {Salzburg}, keywords = {liturgia, vita contemplativa}, author = {Nissen, Peter} }