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. (2009). Biological Sciences - PJSIR, 52(6), 312-315. https://v2.pjsir.org/index.php/biological-sciences/article/view/574