@book { AusdauertrainingTrainingsplanungTrainingslehreII,
    title = "Ausdauertraining Trainingsplanung. Trainingslehre II",
    author = "Michael {Struy}",
    year = "2014",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/279122"
}