Dal, H. Intramolecular Hydrogen Bonding and Tautomerism in Schiff Bases: Synthesis, Spectroscopic and Theoretical Studies of N-(2,2’-Methylenebis(4-methoxyphenyl)salicylidene and N-(2,2’-Methylenebis(4-Methoxyphenyl)-2-Oxonaphthalidene-Methylamine. ajc 2014, 26, 2759-2767.