McClintock, J. B., Heine, J., Slattery, M., & Weston, J. (1991). Biochemical and energetic composition, population biology, and chemical defense of the antarctic ascidian Cnemidocarpa verrucosa lesson. Journal of Experimental Marine Biology and Ecology, 147(2), 163–175. doi:10.1016/0022-0981(91)90180-5