@book { KrafttrainingLangfristigerTrainingsplanung,
    title = "Krafttraining. Langfristiger Trainingsplanung",
    author = "Silvia {Ganthaler}",
    year = "2018",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/426583"
}