@book { WhlenalsAktexpressiverPrferenzoffenbarung,
    title = "Wählen als Akt expressiver Präferenzoffenbarung",
    author = "Markus {Klein}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1092577"
}