@book { TrainingsplanungAusdauer,
    title = "Trainingsplanung Ausdauer",
    author = "Sven {Schmauder}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656204640",
    url = "https://www.hausarbeiten.de/document/195016"
}