G. Tokmajyan, “STUDY OF BROMINATION REACTION OF 2,2,3,6,6-PENTAMETHYL-1,7-DIOXASPIRO[4,4]NONEN-3-ONE-8 AND THE SYNTHESIS OF NEW DERIVATIVES OF SPIROLACTONES ON THE BASE OF 3-BROMOMETHYL DERIVATIVE”, Proc. YSU B: Chem. Biol. Sci., vol. 46, no. 3 (229), pp. 23–27, Oct. 2012.