@book { GesundheitsfrderunginSchulen,
    title = "Gesundheitsförderung in Schulen",
    author = "Verena {Heitzinger} and E. {Ettmayer} and A. {Gaspar}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638009768",
    url = "https://www.hausarbeiten.de/document/84691"
}