@book { AestheticsinSartreandCamusTheChallengeofFreedom,
    title = "Aesthetics in Sartre and Camus. The Challenge of Freedom",
    author = "Heiner {Wittmann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106821"
}