Schwartz, F.J. & Purifoy, J.B. & Safrit, G.W. (2012)
Butterfly rays (Gymnuridae) of North Carolina. Journal of the North Carolina Academy of Science, 127(4), 275–276
DOI: 10.7572/2167-5880-127.4.275

Schwartz, F.J. & Purifoy, J.B. & Safrit, G.W. & Lewis, C. (2010)
Status of roughtail stingray, Dasyatis centroura off North Carolina. Journal of the North Carolina Academy of Science, 126(2), 64–66

Schwartz, F.J. & Purifoy, J.B. & Safrit, G.W. & Churchill, R. (2010)
Variations in shark longline catches during 1972-2008: real or climatically inferred? Journal of the North Carolina Academy of Science, 126(1), 28–30

Schwartz, F.J. & Safrit, G.W. & Purifoy, J.B. & Lewis, O. (1987)
Suitability of the Plastic Cable Tie as a Shark Tag. Journal of the Elisha Mitchell Scientific Society, 103(3), 101–104

Schwartz, F.J. & Safrit, G.W. (1977)
A white southern stingray, Dasyatis americana (Pisces, Dasyatidae), from Pamlico Sound, North Carolina. Chesapeake Science, 18(1), 83–84
DOI: 10.2307/1350369