Coles, R.J. (1915)
Notes on the sharks and rays of Cape Lookout, N.C. Proceedings of the Biological Society of Washington, 28, 89–94
Coles, R.J. (1913)
Notes on the embryos of several species of rays, with remarks on the northward summer migration of certain tropical forms observed on the coast of North Carolina. Bulletin of the American Museum of Natural History, 32(2), 29–35
Coles, R.J. (1910)
Observations on the habits and distribution of certain fishes taken on the coast of North Carolina. Bulletin of the American Museum of Natural History, 28, 337–348