Gravel, P., Johanning, K., McLachlan, J., Vargas, J. A., & Oberdörster, E. (2006). Imposex in the intertidal snail Thais brevidentata (Gastropoda: Muricidae) from the Pacific coast of Costa Rica. Universidad de Costa Rica.

Gravel, Paul, Karla Johanning, John McLachlan, José A. Vargas, and Eva Oberdörster. Imposex in the Intertidal Snail Thais Brevidentata (Gastropoda: Muricidae) From the Pacific Coast of Costa Rica. Universidad de Costa Rica, 2006.

Gravel, Paul, et al. Imposex in the Intertidal Snail Thais Brevidentata (Gastropoda: Muricidae) From the Pacific Coast of Costa Rica. Universidad de Costa Rica, 2006.