@book { VomBruderkriegzumcasusfoederis,
    title = "Vom Bruderkrieg zum «casus foederis»",
    author = "Jens Peter {Kutz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103654"
}