@book { Wirtschaftsprivatrechtkompakt,
    title = "Wirtschaftsprivatrecht kompakt",
    author = "Christoph {Ann} and Ronny {Hauck} and Eva Inés {Obergfell}",
    year = "2017",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221024"
}