@book { FatigueinBusinessAviation,
    title = "Fatigue in Business Aviation",
    author = "Jonathan {Berberich}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656195856",
    url = "https://www.hausarbeiten.de/document/194280"
}