@book { HumaneSchuleinTheorieundPraxis,
    title = "Humane Schule in Theorie und Praxis",
    author = "Hans-Werner {Jendrowiak}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1086843"
}