Genetic and historical evidence disagree on likely sources of the Atlantic amethyst gem clam (Totten, 1834) in CaliforniaDOI: info:10.1111/j.1472-4642.2010.00672.xv. 16No. 4Blackwell Science Ltd.582–592
Hoos, Phillip M., Miller, A. Whitman, Ruiz, Gregory M., Vrijenhoek, Robert C., and Geller, Jonathan B. 2010. "Genetic and historical evidence disagree on likely sources of the Atlantic amethyst gem clam Gemma gemma (Totten, 1834) in California." Diversity & Distributions, 16, (4) 582–592. https://doi.org/10.1111/j.1472-4642.2010.00672.x.