A. A.-E. El-Asmy, B. Jeragh, and M. S. Ali, “Synthesis and characterization of tri- and tetra-metallic complexes of N’1,N’4-bis((E)-3,4-dihydroxybenzylidene)-succinohydrazide”, Eur. J. Chem., vol. 7, no. 1, pp. 81–90, Mar. 2016.