Kovalchukova, O.; Ryabov, M.; Obmenennaya, A.; Popandopulo, N. The Spectroscopic and Theoretical Investigations of Complex Formation of (3E,3’E)-7,7’-(carbonylbis(azanediyl) bis(3-(2-(2-hydroxyphenyl)hydrazono)-4-Oxo-3,4-Dihydronaphthalene-2-Sulfonic Acid) With Metal Cations. JAC 2018, 15, 6207-6217.