R. S. LOKHANDE, S. P. JANWADKAR, SANTOSH KULKARNI, and SANJAY PATIL, “Solvent Extraction And Spectrophotometeric Determination Of Cu(Ii) By Using Acetophenone 2’,5’-Dihydroxy Semicarbazone As An Analytical Reagent”, ijpbs, vol. 2, no. 4, pp. 315–319, Dec. 2011.