Zou, Guanglong, et al. “Synthesis and Crystal Structure of Novel 4-6-Connected Co(II) Coordination Polymers Constructed by Pyridinedicarboxylate and Imidazole-Containing Ligands”. Asian Journal of Chemistry, vol. 26, no. 10, May 2014, pp. 3123-4, doi:10.14233/ajchem.2014.16986.