@book { SelbstgesteuertesLernen,
    title = "Selbstgesteuertes Lernen",
    author = "Klaus {Breuer} and Wolfgang {Ettmüller} and Nicole {Schu} and Rüdiger {Tauschek}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1107585"
}