@book { AmJungbrunnendesLebens,
    title = "Am Jungbrunnen des Lebens",
    author = "Peter {Schulz-Hageleit}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093961"
}