@book { GrundlagendesWirtschaftsprivatrechts,
    title = "Grundlagen des Wirtschaftsprivatrechts",
    author = "Thorsten S. {Richter}",
    year = "2016",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1219069"
}