Edward A. Kolodziej, Nicole Ball e Milton Leitenberg, France, in The Structure of the Defense Industry: An International Survey, Routledge, 1983, p. 85, ISBN0-7099-1611-6.
Around the world, in Foreign Commerce Weekly, vol. 65, n. 22, Washington DC, US Department of Commerce, 2 maggio 1961, p. 4, ISSN 0097-3041 (WC · ACNP).
Transit bus manufacturer profiles, in Fourth Section: Manufacturer's profile, Washington, U.S. Dept. of Transportation, Urban Mass Transportation Administration, Office of Technical Assistance, Office of Bus and Paratransit Systems, ottobre 1982, pp. 128-137, OCLC9384438.
(DE) Erich H. Moneta, Die europäische Automobilindustrie; Unternehmungen und Produktion [The european automotive industry. Companies and production], A. Lutzeyer, 1963, p. 143, OCLC7752994.
Around the world, in Foreign Commerce Weekly, vol. 65, n. 22, Washington DC, US Department of Commerce, 2 maggio 1961, p. 4, ISSN 0097-3041 (WC · ACNP).