P. Gravel, K. Johanning, J. McLachlan, J. A. Vargas, and E. Oberdörster, “Imposex in the intertidal snail <i>Thais brevidentata</i> (Gastropoda: Muricidae) from the Pacific coast of Costa Rica”, Rev. Biol. Trop., vol. 54, no. S1, pp. 21–26, Sep. 2006.