Checklist of living Chondrichthyes. In W.C. Hamlett (Ed.), Reproductive biology and phylogeny of chondrichthyes: sharks, rays and chimaeras, Vol. 3 (pp. 503–548). Science Publishers, Endfield, USA
Tiburones y rayas de Colombia (Pisces: Elasmobranchii). Lista revisada, actualizada y comentada. Boletín de Investigaciones Marinas y Costeras, 34, 128–169
Tiburones y rayas de Colombia (Pisces: Elasmobranchii). Lista actualizada, revisada y comentada. Boletín de Investigaciones Marinas y Costeras, 36, 111–149
A survey of tail spine characteristics of stingrays frequenting western Atlantic Ocean and South American freshwater rivers. Journal of the North Carolina Academy of Science, 125(2), 47–60
Ways to identify stingrays of the world possessing or lacking serrated stinging tail spines. Journal of the North Carolina Academy of Science, 125(3), 107–109