Olasomi, O.E., et al. “Synthesis, Characterization and Antimicrobial Studies of Coordination Compounds of L-Serine and Their Mixed Ligand Complexes With L-Aspartic Acid”. Asian Journal of Chemistry, vol. 29, no. 2, Dec. 2016, pp. 371-4, doi:10.14233/ajchem.2017.20203.