Lim, D.D.; Motta, P.; Mara, K.; Martin, A.P. Phylogeny of hammerhead sharks (Family Sphyrnidae) inferred from mitochondrial and nuclear genes. Molecular Phylogenetics and Evolution. 2010, 55 (2): 572–579. PMID 20138218. doi:10.1016/j.ympev.2010.01.037.
Southall, E.J.; D.W. Sims. A smooth hammerhead shark (Sphyrna zygaena) from south-west England. Marine Biodiversity Records. 2005, 1: e9. doi:10.1017/S1755267206000984.
Visser, I.N. First Observations of Feeding on Thresher (Alopias vulpinus) and Hammerhead (Sphyrna zygaena) Sharks by Killer Whales (Orcinus orca) Specialising on Elasmobranch Prey. Aquatic Mammals. January 2005, 31 (1): 83–88. doi:10.1578/AM.31.1.2005.83.