L.  Stefaniak, Zhang, H., Gittenberger, A., Smith, K., Holsinger, K., Lin, S., and Whitlatch, R., ?Determining the native region of the putatively invasive ascidian Didemnum vexillum Kott, 2002?, Journal of Experimental Marine Biology and Ecology, vol. 422-423, pp. 64-71, 2012.