@book { QuadraturderVenus,
    title = "Quadratur der Venus",
    author = "Mircea {Barnaure} and Ioana {Orleanu}",
    year = "2020",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1001868"
}