@book { EineHimmelskarteausderEiszeit,
    title = "Eine Himmelskarte aus der Eiszeit?",
    author = "Michael A. {Rappenglück}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088522"
}