@book { DeutschesKolonialrechtinOstafrika18851891,
    title = "Deutsches Kolonialrecht in Ostafrika 1885-1891",
    author = "Klaus {Richter}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1091831"
}