Electron spin resonance detection of oxygen radicals released by UVA-irradiated human fibroblasts J. P. Souchard, G. Pierlot, M. A. Barbacanne, M. Charveron, J.-L. Bonafé and F. Nepveu J. Chim. Phys., 96 1 (1999) 101-109 DOI: 10.1051/jcp:1999116