@book { UmfangundGrenzendesWeisungsrechtsvonGmbHGesellschaftern,
    title = "Umfang und Grenzen des Weisungsrechts von GmbH-Gesellschaftern",
    author = "Roland {Karl}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/309071"
}