@book { RepetitoriumKardiologie5Auflage,
    title = "Repetitorium Kardiologie 5. Auflage",
    author = "Stefan {Pinger}",
    year = "2019",
    publisher = "Deutscher Ärzteverlag",
    address = "Köln, Deutschland",
    doi = "10.47420/9783769136883",
    url = "https://deutscheraerzteverlag.openpublishing.com/document/457680"
}