@book { DerGmbHGeschftsfhrerimtschechischenRecht,
    title = "Der GmbH-Geschäftsführer im tschechischen Recht",
    author = "Sören {Langner}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099632"
}