K. CHANDRASEKHARAN and V. Kannappan, “FAST CHIRAL HPLC PROCEDURE FOR THE SIMULTANEOUS DETERMINATION OF DROPROPIZINE ENANTIOMERS AND ITS NONPOLAR IMPURITY IN RAW MATERIAL AND PHARMACEUTICAL FORMULATION”, Int J Pharm Pharm Sci, vol. 6, no. 11, pp. 103–106, Nov. 2014.