@book { DiedeutschePostvonderPostreformIbiszumBrsengang19892000,
    title = "Die deutsche Post von der Postreform I bis zum Börsengang 1989-2000",
    author = "Wolfgang {Lotz}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103463"
}