“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): 312-15. https://v2.pjsir.org/index.php/biological-sciences/article/view/574.