Rigby, C.L., Harry, A.V., Pacoureau, N., Herman, K., Hannan, L. & Derrick, D.: Rhizoprionodon acutusIUCN Red List of Threatened Species. Version 2020-3. 2020. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 12.12.2020. (englanniksi)