@book { FormimamerikanischenErbrecht,
    title = "Form im amerikanischen Erbrecht",
    subtitle = "Zwischen Formalismus und harmless error",
    author = "Ursula {Philipp}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093273"
}