@book { EtienneCabetundseineIkarischeKolonie,
    title = "Etienne Cabet und seine Ikarische Kolonie",
    author = "Joachim {Höppner} and Waltraud {Seidel-Höppner}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093565"
}