@book { TrainingsplanungfreinAusdauertraining,
    title = "Trainingsplanung für ein Ausdauertraining",
    author = "Moritz {Wenninger}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656310211",
    url = "https://www.hausarbeiten.de/document/204086"
}