@book { SternstundenamKaiserhof,
    title = "Sternstunden am Kaiserhof",
    subtitle = "Michael Scotus und sein Buch von den Bildern und Zeichen des Himmels",
    author = " {Ackermann FSA}",
    year = "2023",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b20873",
    url = "https://www.peterlang.com/document/1353655"
}