Stevens, J., Fowler, S.L., Soldo, A., McCord, M., Baum, J., Acuña, E., Domingo, A. & Francis, M.: Lamna nasusIUCN Red List of Threatened Species. Version 2013.1. 2006. International Union for Conservation of Nature, IUCN, Iucnredlist.org. (englanniksi)