@book { PointinTimevsThroughtheCycle,
    title = "Point-in-Time vs. Through-the-Cycle",
    author = "Florian {Hock}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836606080",
    url = "https://m.diplom.de/document/225409"
}