Sabounchei, S.J., A.R. Dadrass, and H. Nemattalab. 2010. “Synthesis and Multinuclear NMR Study of 4-Methylbenzoylmethylene-Tri-Ptolylphosphorane Ylide and Its Related Complexes With Mercury(II) Halides”. Asian Journal of Chemistry 20 (6):4329-34. https://asianpubs.org/index.php/ajchem/article/view/19024.