A. Demchuk, K. Vydynevychus, B. Zay, S. Toporov, O. Zhukovetska, and D. Snigur, “COMPLEXATION OF IRON (II) AND IRON (III) WITH SOME DERIVATIVES OF 6,7-DIHYDROXYBENZOPYRYLIUM SALTS IN SOLUTIONS”, Ukr. Chem. Journ., vol. 91, no. 8, pp. 3-12, Sep. 2025.