@inbook {Pansters 2014c, title = {The Secret of Silence. Spiritual concentration as theological concern}, booktitle = {Krijn Pansters (ed.), The Carthusians in the Low Countries. Studies in monastic history and heritage}, series = {Miscellanea Neerlandica, 43 / Studia Cartusiana, 4}, year = {2014}, pages = {57-69}, address = {Leuven}, keywords = {quies, silentium, solitudo}, author = {Krijn Pansters} }