@book { DasJugendalter,
    title = "Das Jugendalter",
    subtitle = "Perspektiven pädagogisch-psychologischer Forschung",
    author = "Martin K. W. {Schweer}",
    year = "2004",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1096332"
}