@book { DerpolitischeWiderstandgegendasNSRegime,
    title = "Der politische Widerstand gegen das NS-Regime",
    author = "Leonhard {Kern}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638005913",
    url = "https://www.hausarbeiten.de/document/85124"
}