Kurdyukov, V.V., and A.I. Tolmachev. 2024. “Polymethine Dyes Based on Pyrylium Salts With Unsaturated Cyclic Groups in the 4-Position”. Reports of the National Academy of Sciences of Ukraine, no. 12 (September). Kyiv, Ukraine:90-96. https://doi.org/10.15407/dopovidi2017.12.090.