Figueiredo, I. & Moura, T. & Bordalo-Machado, P. & Neves, A. & Rosa, C. & Gordo, L.S. (2007)
Evidence for temporal changes in ray and skate populations in the Portuguese coast (1998-2003) - its implications in the ecosystem.
Aquatic Living Resources, 20(1), 85–93 DOI: 10.1051/alr:2007019