@book { GrundzgedesWirtschaftsprivatrechts,
    title = "Grundzüge des Wirtschaftsprivatrechts",
    author = "Peter {Förschler}",
    year = "2017",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221035"
}