Walsh, D., Reeves, R. A., Saul, D. J., Gray, R. D., MacKenzie, L., Bergquist, P. R., & Bergquist, P. L. (1998). Heterogeneity of SSU and LSU rDNA sequences of Alexandrium species. Biochemical Systematics and Ecology, 26(5), 495-509. doi:10.1016/S0305-1978(98)00006-4.