Studies on Cu (II) and Ni (II) Sulphate Chelates of Benzyl, Salicylic and Acetyl Salicylo-Hydrazones: Synthesis of Cu (II) and Ni (II) Sulphate Complexes. Pakistan Journal of Scientific & Industrial Research. 2009;52(6):312-315. Accessed March 10, 2026. https://www.v2.pjsir.org/index.php/biological-sciences/article/view/574