@book { WeimarandWork,
    title = "Weimar and Work",
    author = "Martin {Kley}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "New York, United States of America",
    doi = "10.3726/978-1-4539-0924-9",
    url = "https://www.peterlang.com/document/1051191"
}