@book { BrsenundmultilateraleHandelssystemeimWettbewerb,
    title = "Börsen und multilaterale Handelssysteme im Wettbewerb",
    author = "Horst {Hammen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108001"
}