@book { DielangfristigeRenditedeutscherStandardaktien,
    title = "Die langfristige Rendite deutscher Standardaktien",
    author = "Ulrich {Ronge}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093751"
}