@book { VomKrftemessenzumKmpfenamBoden,
    title = "Vom Kräftemessen zum Kämpfen am Boden",
    author = "Thomas {Michalak}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656123699",
    url = "https://www.hausarbeiten.de/document/188628"
}