@book { PhilosophiederLebensbejahung,
    title = "Philosophie der Lebensbejahung ",
    author = "Hans-Arved {Willberg}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18474",
    url = "https://www.peterlang.com/document/1111697"
}