S. A. Save, R. S. Lokhande, and A. S. Chowdhary, “Determination of 1, 2-Benzenedicarboxylic acid, bis (2-ethylhexyl) ester from the twigs of Thevetia peruviana as a Colwell Biomarker”, J Inn Pharm Bio Sci, vol. 2, no. 3, pp. 349–362, Jul. 2015.