S. Riemschneider, H.-P. Podhaisky, T. Klapperstück, and W. Wohlrab, “Relevance of reactive oxygen species in the induction of 8-oxo-2’-deoxyguanosine in HaCaT keratinocytes”, Acta Derm Venereol, vol. 82, no. 5, pp. 325–328, Nov. 2002.