El–Dossoki, Farid I. “Spectrophotometric and Electric Studies on the Ligand 4–(4`–Phenyl–2`–Thiazolylazo) Resorcinol and Its Complexation With Some Metal Ions”. Al-Mukhtar Journal of Sciences, vol. 26, no. 1, Dec. 2011, pp. 95-112, doi:10.54172/mjsc.v26i1.201.