1. 2005. Physical habitat, disturbances, and the population ecology of the migratory snail Neritina virginea (Gastropoda: Neritidae) in Puerto Rico streams. PhD Dissertation, University of Puerto Rico, Rio Piedras, Puerto Rico.
2. Hierarchical contribution of river–ocean connectivity, water chemistry, hydraulics, and substrate to the distribution of diadromous snails in Puerto Rican streams
3. 1980. A study of fish populations in Espíritu Santo River estuary. MSc thesis, University of Puerto Rico, Rio Piedras, Puerto Rico.