JAVAD SABOUNCHEI, SEYYED, and A.R. DADRASS. “Synthesis and Spectral Studies of Mercury(II) Complexes of 4-Bromobenzoylmethylenetriphenylphosphorane”. Asian Journal of Chemistry, vol. 19, no. 7, Mar. 2010, pp. 5471-6, https://asianpubs.org/index.php/ajchem/article/view/13159.