@book { berdieunerschpflicheSchichtungunsererNatur,
    title = "Über die «unerschöpfliche Schichtung unserer Natur»",
    author = "Martina {Wegener}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093249"
}