Sonnino Sorisio, L.; De Maddalena, A.; Visser, I. N. Interaction Between Killer Whales (<i>Orcinus orca</i>) and Hammerhead Sharks (<i>Sphyrna</i> Sp.) in Galápagos Waters. Lat. Am. J. Aquat. Mamm. 2006, 5, 69-71.