@book { IdentittundAlter,
    title = "Identität und Alter",
    subtitle = "Eine tiefenpsychologische Untersuchung",
    author = "Rolf {Horak}",
    year = "2004",
    publisher = "Meidenbauer",
    address = ", Germany",
    url = "https://www.peterlang.com/document/1098685"
}