Biswas, P. K., E. Huq, M. Rahman, and H. P. Nur. “Synthesis Of 2-Benzoyl-3,4,5,6-Tetrasubstitutedbenzoic Acid From Tetrasubstituted Phthalic Anhydride Using Organometalics”. Journal of the Bangladesh Chemical Society, vol. 25, no. 2, May 2013, pp. 186-93, doi:10.3329/jbcs.v25i2.15085.