↑ Last, P.R.; Stevens, J.D. (2009). Sharks and Rays of Australia . Harvard University Press. tr. 324–325. ISBN0-674-03411-2.
↑ Compagno, L.J.V.; Last, P.R. (1999). “Hypnidae. Coffin rays”. Trong Carpenter, K.E.; Niem, V.H. FAO Identification Guide for Fishery Purposes. The Living Marine Resources of the Western Central Pacific. Food and Agricultural Organization of the United Nations. tr. 1447–1448. ISBN92-5-104302-7.
↑ Michael, S.W. (1993). Reef Sharks & Rays of the World. Sea Challengers. tr. 79–80. ISBN0-930118-18-9.