Binti Idris, Nuruljannah Suhaida, et al. “Synthesis, Characterization and Coordination Chemistry of N,N’-bis(3-pyridylmethyl)benzene-1,4-Dicarboxamide With Palladium and Ruthenium Salts”. Asian Journal of Chemistry, vol. 29, no. 7, May 2017, pp. 1459-62, doi:10.14233/ajchem.2017.20518.