@book { OptimaleBesteuerung,
    title = "Optimale Besteuerung",
    subtitle = "(«Optimal Taxation»)",
    author = "Gerold {Krause-Junk}",
    year = "1983",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b13726",
    url = "https://www.peterlang.com/document/1068305"
}