Smocovitis, V.B. (2009). "The "Plant Drosophila": E. B. Babcock, the genus Crepis, and the evolution of a genetics research program at Berkeley, 1915–1947". Historical Studies in the Natural Sciences. 39 (3): 300–355. doi:10.1525/hsns.2009.39.3.300. PMID20077617.
Smocovitis, V.B. (2009). "The "Plant Drosophila": E. B. Babcock, the genus Crepis, and the evolution of a genetics research program at Berkeley, 1915–1947". Historical Studies in the Natural Sciences. 39 (3): 300–355. doi:10.1525/hsns.2009.39.3.300. PMID20077617.