@book { DerMarschzudenGrbernvonKarlundRosa,
    title = "Der Marsch zu den Gräbern von «Karl und Rosa»",
    subtitle = "Geschichte eines Gedenktages",
    author = "Jan {Kohlmann}",
    year = "2004",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098054"
}