| Hulen, K.G., Albert, J.S., and Crampton, W.G.R. 2005. Phylogenetic systematics and historical biogeography of the Neotropical electric fish Sternopygus (Teleostei: Gymnotiformes). Systematics and Biodiversity. 2005 3: 407-432. |
| Crampton, W.G.R., Hulen, K.G., and Albert, J.S. 2004. Sternopygus branco: A New Species of Neotropical Electric Fish (Gymnotiformes: Sternopygidae) from the Lowland Amazon Basin, with Descriptions of Osteology, Ecology and Electric Organ Discharges. Copiea. 2004 2:245-259. |
| Crampton, W.G.R., Hulen, K.G., and Albert, J.S. 2004. Redescription of Sternopygus obtusirostris (Gymnotiformes, Sternopygidae) from the Amazon basin, with description of osteology, ecology and electric organ discharges. Ichthyological Explorations Freshwaters. 2004 15(2): 121-134 |
| Chapman, L.J. and Hulen, K.G. 2001. Implications of hypoxia for the brain size and gill morphometry of Mormyrid fishes. Journal of Zoology. London 2001 254:461-472. |
|