@book { PJohannesBaptistaDielSJClemensBrentano, title = "P. Johannes Baptista Diel S.J.- Clemens Brentano", author = "Bernhard {Gajek}", year = "2021", publisher = "Peter Lang Verlag", address = "Lausanne, Switzerland", url = "https://www.peterlang.com/document/1069301" }