@book { VaritesundSingspielhallenUrbaneRumedesVergngens,
    title = "Variétes und Singspielhallen – Urbane Räume des Vergnügens",
    author = "Martin {Rühlemann}",
    year = "2021",
    publisher = "Meidenbauer",
    address = ", Germany",
    url = "https://www.peterlang.com/document/1109294"
}