Zhang, J.; Zhang, Y.; Zhang, S.-T.; Dong, X.-Y.; Dong, W.-K. Synthesis and Structural Characterization of Trinuclear Cu2+, Zn2+ and Zn2+-Eu3+ Complexes Based on 2,3-Dihydroxybenzene-1,4-Dicarbaldehyde, 1,3-bis(Aminooxy)propane With 3-Ethoxysalicylaldehyde. ajc 2015, 27, 654-656.