@book { DerPdagogeFFrbelunddieFrauen,
    title = "Der Pädagoge F. Fröbel und die Frauen",
    author = "Detlef {Krone}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108272"
}