H. R. Sargsian, L. A. Nersesyan, A. A. Vardanian, and S. A. Markarian, “THE STUDY OF DIMETHYL-, DIETHYL- AND DIPROPYLSULPHOXIDE ANTIOXIDANT PROPERTIES FROM UV/VIS SPECTRA OF 2,2-DIPHENYL-1-PICRYLHYDRAZYL FREE RADICAL”, Proc. YSU B: Chem. Biol. Sci., vol. 39, no. 1 (206), pp. 53–57, Feb. 2005.