@book { FhrenundMeditieren,
    title = "Führen und Meditieren",
    subtitle = "Aufbruch in ein neues Bewusstsein",
    author = "Hans {Wielens}",
    year = "2003",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095470"
}