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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
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Tiburones y rayas de Colombia (Pisces: Elasmobranchii). Lista actualizada, revisada y comentada. Boletín de Investigaciones Marinas y Costeras, 36, 111–149
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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
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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