Demchuk, A.; Vydynevychus , K.; Zay, B.; Toporov, S.; Zhukovetska, O.; Snigur, D. COMPLEXATION OF IRON (II) AND IRON (III) WITH SOME DERIVATIVES OF 6,7-DIHYDROXYBENZOPYRYLIUM SALTS IN SOLUTIONS. Ukr. Chem. Journ. 2025, 91, 3-12.