@book { RusslandunddieWahlbeobachtungenderOSZE,
    title = "Russland und die Wahlbeobachtungen der OSZE",
    author = "Wolfgang {Sender}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108484"
}