“SOME CHEMICAL TRANSFORMATIONS OF CONDENSED TWO-RING SYSTEMS, THAT INCLUDE γ-LACTONE AND OXIRANE FRAGMENTS”, Proc. YSU B: Chem. Biol. Sci., vol. 44, no. 3 (223), pp. 35–40, Sep. 2010, doi: 10.46991/PYSUB.2010.44.3.035.