G. Venkatesa Prabhu and A. Mohamed Kasim, “Synthesis, Characterization and Biologycal Activity of Oxovanadium(IV), Thorium(IV) and Dioxouranium(VI) Complexes of N-(1-pipridinobenzyl)urea and N,N’-bis(N-morpholinobenzyl)urea”, ajc, vol. 12, no. 2, pp. 379–384, Mar. 2010.