H. Al-Maydama, T. Y. Al-Ansi, Y. M. S. Jamil, and A. H. Ali, “Biheterocyclic ligands: synthesis, characterization and coordinating properties of bis(4-amino-5-mercapto-1,2,4-triazol-3-yl) alkanes with transition metal ions and their thermokinetic and biological studies”, Eclet. Quim., vol. 33, no. 3, pp. 29–42, Sep. 2008.