@book {Klapper 1960,
	title = {Der Erfurter Kart{\"a}user Johannes Hagen. Ein Reformtheologe des 15. Jahrhunderts. Dl. 1: Leben und Werk},
	series = {Erfurter theologische Studien},
	number = {9},
	year = {1960},
	pages = {X-133-(1)},
	address = {Leipzig},
	keywords = {biographiae, Joannes de Indagine O.Cart. (biographia)},
	attachments = {http://cartusiana.org./sites/default/files/Recensie\%20De\%20Vooght_RHE\%2057\%20\%281962\%29\%20948-949.pdf},
	author = {Klapper, Joseph}
}
