“Synthesis, and characterization of Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) complexes with novel Schiff base ligand derived from 4-Hydroxy-3-(1-((5-phenyl-1,3,4-oxadiazol-2- yl)imino)ethyl)-2H-chromen-2-one”, IJFANS, vol. 11, no. 2, pp. 1981–1992, Jan. 2022, Accessed: Aug. 10, 2026. [Online]. Available: https://www.ijfans.org/index.php/Journal/article/view/5194