“NEW LACTON-HETEROCYCLES SYNTHESIS ON BASE OF 2-(2-ETHOXY-3-BROMOPROPYL)-2-ETHOXYCARBONYL-4-BUTANOLIDE”. Proceedings of the YSU B: Chemical and Biological Sciences, vol. 47, no. 2 (231), July 2013, pp. 3-5, https://doi.org/10.46991/PYSUB.2013.47.2.003.