@book { DasKaiserMaximilianIvonMxicoDenkmalinWien,
    title = "Das Kaiser Maximilian I. von México-Denkmal in Wien",
    author = "Günther {Berger}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100737"
}