@book { DieSozialpsychologiederDDR,
    title = "Die Sozialpsychologie der DDR",
    subtitle = "Eine wissenschaftshistorische Untersuchung",
    author = "Kitty {Dumont}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088782"
}