@book { PsychischbedingteEheunfhigkeit,
    title = "Psychisch bedingte Eheunfähigkeit",
    subtitle = "Begriffe - Abgrenzungen - Kriterien",
    author = "Klaus {Lüdicke}",
    year = "1979",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1070381"
}