@book { ProblematischePdagogen,
    title = "Problematische Pädagogen",
    author = "Judith {Ricker-Abderhalden}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1071175"
}