@book { ContemporaryResearchinSportsEconomics,
    title = "Contemporary Research in Sports Economics",
    author = "Oliver {Budzinski} and Arne {Feddersen}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04103-3",
    url = "https://www.peterlang.com/document/1048005"
}