A. Kumar, N. Pal Singh, U. Agrawal, and K. Kumar, “Synthesis, Characterization and Biological Activity of Ni(II), Cu(II) and Fe(III) Complexes Derived from N2,N6-bis(5-Mercapto-1,3,4-thiadiazol-2-yl)pyridine-2,6-dicarboxamide”, ajc, vol. 32, no. 7, pp. 1691–1696, Jun. 2020.