Gavazov, K. B., & Toncheva, G. K. (2009). Extraction-Spectrophotometric Studies on the Ion-Pairing Between Some 2,3,5-Substituted Monotetrazolium Cations and Anions Deriving from 4-(2-Thiazolylazo)resorcinol or 4-(2-Pyridylazo)resorcinol. JOURNAL OF ADVANCES IN CHEMISTRY, 5(2), 641–651. https://doi.org/10.24297/jac.v5i2.2653