F. Martak, W. Utomo, Z. Nugraheni, and P. Budi, “Synthesis and Toxicity Test of M/Zn(II) Complexes [M = Mn(II), Co(II)] with Pyridine-2,6-dicarboxylic Acid Ligand”, ajc, vol. 28, no. 8, pp. 1773–1776, Apr. 2016.