Khochikyan, T. V., et al. “SYNTHESIS OF NEW HETEROCYCLIC COMPOUNDS ON THE BASE OF ACETYL-α-SPIRODILACTONES”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 44, no. 3 (223), Sept. 2010, pp. 30-34, doi:10.46991/PYSU:B/2010.44.3.030.