Shapiro, Helen (Winter 1991). "Determinants of Firm Entry into the Brazilian Automobile Manufacturing Industry, 1956-1968". The Business History Review. 65 (4, The Automobile Industry): 897. doi:10.2307/3117267. JSTOR3117267. S2CID153363903.
Shapiro, Helen (Winter 1991). "Determinants of Firm Entry into the Brazilian Automobile Manufacturing Industry, 1956-1968". The Business History Review. 65 (4, The Automobile Industry): 897. doi:10.2307/3117267. JSTOR3117267. S2CID153363903.
Shapiro, Helen (Winter 1991). "Determinants of Firm Entry into the Brazilian Automobile Manufacturing Industry, 1956-1968". The Business History Review. 65 (4, The Automobile Industry): 897. doi:10.2307/3117267. JSTOR3117267. S2CID153363903.
wikipedia.org
de.wikipedia.org
Deutsche Autos, Band 4, 2001, p. 392. Oswald, Werner[in German] (2001). Deutsche Autos [German Cars] (in German). Vol. Band [Volume] 4: 1945–1990 Audi, BMW, Mercedes, Porsche und andere [and others]. Stuttgart: Motorbuch Verlag. ISBN3613021315.