@book { DirekteDemokratieinderinnerparteilichenWillensbildung,
    title = "Direkte Demokratie in der innerparteilichen Willensbildung",
    author = "Klaus {Seidel}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1086500"
}