• Hydrogen peroxide, superoxide, and hydroxyl radicals are involved in the phototoxic action of hematoporphyrin derivative against tumor cellsTšekulajeva, Ludmilla; Ševtšuk, Igor; Tšekulajev, Vladimir; Ilmarinen, KajaJournal of environmental pathology, toxicology, and oncology2006 / p. 51-77 : ill https://pubmed.ncbi.nlm.nih.gov/16566710/