@book { Absentiaconsensus,
    title = "Absentia consensus",
    subtitle = "Der fehlende Mindestwille zur Ehe als Ehenichtigkeitsgrund",
    author = "Hermann {Kahler}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088391"
}