@book { JazzBehindtheIronCurtain,
    title = "Jazz Behind the Iron Curtain",
    author = "Gertrud {Pickhan} and Rüdiger {Ritter}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108731"
}