Kumar, R. et al. 2012. Synthesis, structural elucidation and antimicrobial effectiveness of coordination entities of cobalt (II) and nickel (II) derived from 9,17-diaza-2,6,11,15-tetrathia-1,7,10,16-(1,2)-tetrabenzenacyclooctadecaphan-8,17-diene. European Journal of Chemistry. 3, 1 (Mar. 2012), 57–64. DOI:https://doi.org/10.5155/eurjchem.3.1.57-64.448.