TOLMACHEV, A.; KUDINOVA, M.; KURDYUKOV, V. New polymetine dyes from furo [3,2-f]-, furo [2,3-h] flavilium and 4-methyl furo [4′, 3′] flavilium salts . Reports of the National Academy of Sciences of Ukraine, Kyiv, Ukraine, n. 6, p. 98–104, 2018. DOI: 10.15407/dopovidi2018.06.098. Disponível em: https://nasu-periodicals.org.ua/index.php/dp/article/view/2809. Acesso em: 30 may. 2026.