@book { TheUnitedStatesandtheCongoCrisis19601961,
    title = "The United States and the Congo Crisis, 1960 - 1961",
    author = "Tim {Pfefferle}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656338833",
    url = "https://www.hausarbeiten.de/document/206564"
}