@book { LehrbuchSportmedizin,
    title = "Lehrbuch Sportmedizin",
    author = "Christine {Graf}",
    year = "2011",
    publisher = "Deutscher Ärzteverlag",
    address = "Köln, Deutschland",
    doi = "10.47420/9783769136463",
    url = "https://deutscheraerzteverlag.openpublishing.com/document/916898"
}