Adrianus Kalmijn: The Electric and Magnetic Sense of Sharks, SkaS, and Rays (1974):
http://www.uvm.edu/rsenr/wfb232/Kalmijn.pdf
The physical nature of life - by Adrianus Kalmijn (2002): https://www.ncbi.nlm.nih.gov/pubmed/14692484 http://sci-hub.tw/https://www.ncbi.nlm.nih.gov/pubmed/14692484
Bioelectric Fields in Sea Water and the Function of the Ampullae of Lorenzini in Elasmobranch Fishes - by Adrianus Kalmijn (1972): https://www.amazon.com/Bioelectric-Function-Ampullae-Lorenzini-Elasmobranch/dp/B00B06RCIQ
A biological function for electroreception in sharks and rays - Carl D. Hopkins:
http://jeb.biologists.org/content/213/7/1005
Sharks: Ocean spies of the future?: https://www.bu.edu/sjmag/scimag2005/features/spysharks.htm
The Shark's Electric Sense. Sensitive detector of electric fields helps sharks zero in on prey:
http://depa.fquim.unam.mx/amyd/archivero/Electrosensores_en_accion_21561.pdf
Brain Waves - Neuroscience News, by R. Douglas Fields:
https://rdouglasfields.wordpress.com
Sharks Use ESP: https://rdouglasfields.wordpress.com/2014/08/30/sharks-use-esp/