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Spinal cord pathways involved in initiation of swimming in the stingray, Dasyatis sabina: spinal cord stimulation and lesions. Journal of Neurophysiology, 51(3), 578–591

Williams, B.J. & Droge, M.H. & Leonard, R.B. (1984)
Intracellular recording from pectoral fin motoneurons of the stingray Dasyatis sabina, an elasmobranch fish. Journal of Neurophysiology, 51(4), 666–679

Williams, B.J. & Droge, M.H. & Hester, K. & Leonard, R.B. (1981)
Induction of swimming in the high spinal stingray by L-DOPA. Brain Research, 220(1), 208–213
DOI: 10.1016/0006-8993(81)90228-6