@book { UnternehmensentwicklungundderGangandieBrse,
    title = "Unternehmensentwicklung und der Gang an die Börse",
    author = "Rikelf {Börgmann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1090321"
}