@book { JahrbuchfrPdagogik1997,
    title = "Jahrbuch für Pädagogik 1997",
    author = "Hans-Jochen {Gamm} and Gernot {Koneffke}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1110150"
}