Tokmajyan, G.G. “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”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 46, no. 3 (229), Oct. 2012, pp. 23-27, doi:10.46991/PYSU:B/2012.46.3.023.