@book { CharlotteBhler,
    title = "Charlotte Bühler",
    subtitle = "oder Der Lebenslauf als psychologisches Problem",
    author = "Gerald {Bühring}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101771"
}