Hegazy, Wael Hussein. 2013. “New Lanthanide Complexes of 1,1`-bis[(2-thienylmethylidene)hydrazono-1-Ethyl]-Ferrocene and 1,1`-bis(2,3-Dihydro-2-methylbenzo[d]thiazol-2-yl)ferrocene: Synthesis, Characterization and Antimicrobial Properties”. European Journal of Chemistry 4 (3):255-59. https://doi.org/10.5155/eurjchem.4.3.255-259.833.