@book { WittgensteinJahrbuch20032006,
    title = "Wittgenstein-Jahrbuch 2003/2006",
    author = "Stefan {Majetschak}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101925"
}