Szabo, T. & Kalmijn, A.J. & Enger, P.S. & Bullock, T.H. (1972)
Microampullary Organs and a Submandibular Sense Organ in the Fresh Water Ray, Potamotrygon.
Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, 79(1), 15–27 DOI: 10.1007/BF00693615