@book { DieZulassungvonParteienzurBundestagswahl,
    title = "Die Zulassung von Parteien zur Bundestagswahl",
    author = "Martin {Jäger}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18196",
    url = "https://www.peterlang.com/document/1059500"
}