Newell, C. A.; Hymowitz, T. (1. 3. 1983). „Hybridization in the Genus Glycine Subgenus Glycine Willd. (Leguminosae, Papilionoideae)”. American Journal of Botany. Botanical Society of America. 70 (3): 334—348. JSTOR2443241. doi:10.2307/2443241.
Millard, Wik Reynold (1. 7. 1962). „Henry Ford's Science and Technology for Rural America”. Technology and Culture. The Johns Hopkins University Press on behalf of the Society for the History of Technology. 3 (3): 247—258. JSTOR3100818. doi:10.2307/3100818.
Newell, C. A.; Hymowitz, T. (1. 3. 1983). „Hybridization in the Genus Glycine Subgenus Glycine Willd. (Leguminosae, Papilionoideae)”. American Journal of Botany. Botanical Society of America. 70 (3): 334—348. JSTOR2443241. doi:10.2307/2443241.
Millard, Wik Reynold (1. 7. 1962). „Henry Ford's Science and Technology for Rural America”. Technology and Culture. The Johns Hopkins University Press on behalf of the Society for the History of Technology. 3 (3): 247—258. JSTOR3100818. doi:10.2307/3100818.