@book { DieMilitrFlugzeugindustrieimDrittenReich,
    title = "Die Militär-Flugzeugindustrie im Dritten Reich",
    author = "Christian {Matenaar}",
    year = "1999",
    publisher = "Diplom.de",
    address = "Hamburg, Germany",
    doi = "10.3239/9783832412449",
    url = "https://m.diplom.de/document/217159"
}