@book { DasKartellrechtderSportregeln,
    title = "Das Kartellrecht der Sportregeln",
    author = "Christian {Dietz}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03770-8",
    url = "https://www.peterlang.com/document/1047911"
}