@book { WerbinichGrundproblememenschlicherExistenz,
    title = "Wer bin ich? Grundprobleme menschlicher Existenz",
    author = "Diana Christina {Zisler}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106660"
}