@book { KreatinimProfisportundimSportabitur,
    title = "Kreatin im Profisport und im Sportabitur",
    author = "Florian {Herold}",
    year = "2005",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640078929",
    url = "https://www.hausarbeiten.de/document/109714"
}