Copenhaver, Brian P. (September 1991). «Una historia de dos peces: Magical objects in natural history from antiquity through the scientific revolution». Journal of the History of Ideas52 (3): 373-398. JSTOR2710043. PMID11622951. doi:10.2307/2710043.
elasmo-research.org
Martin, R. Aidan. «Electric Rays». ReefQuest Centre for Shark Research. Consultado el 12 de octubre de 2008.
jstor.org
Copenhaver, Brian P. (September 1991). «Una historia de dos peces: Magical objects in natural history from antiquity through the scientific revolution». Journal of the History of Ideas52 (3): 373-398. JSTOR2710043. PMID11622951. doi:10.2307/2710043.
nih.gov
ncbi.nlm.nih.gov
Copenhaver, Brian P. (September 1991). «Una historia de dos peces: Magical objects in natural history from antiquity through the scientific revolution». Journal of the History of Ideas52 (3): 373-398. JSTOR2710043. PMID11622951. doi:10.2307/2710043.