@book { OvercomingMortality,
    title = "Overcoming Mortality",
    author = "Andrea {Soprek}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640742561",
    url = "https://www.hausarbeiten.de/document/161072"
}