Ali, M.A. & Anctil, M. (1974)
Retinas of the electric ray (Narcine brasiliensis) and the freshwater stingray (Paratrygon motoro). Vision Research, 14(7), 587–588
DOI: 10.1016/0042-6989(74)90048-0

Anctil, M. & Ali, M.A. (1974)
Giant ganglion cells in the retina of the hammerhead shark (Sphyrna lewini). Vision Research, 14(9), 903–904
DOI: 10.1016/0042-6989(74)90154-0