@book { SpiritualittindermodernenMedizin,
    title = "Spiritualität in der modernen Medizin",
    author = "Peter {Heusser}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1100561"
}