Gavazov, Kiril Blazhev, and Galya K. Toncheva. 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):641-51. https://doi.org/10.24297/jac.v5i2.2653.