Bischof, K., P. J. Janknegt, A. G. Buma, J. W. Rijstenbil, G. Peralta, and A. M. Breeman. “Oxidative Stress and Enzymatic Scavenging of Superoxide Radicals Induced by Solar UV-B Radiation in Ulva Canopies from Southern Spain”. Scientia Marina, vol. 67, no. 3, Sept. 2003, pp. 353-9, doi:10.3989/scimar.2003.67n3353.