S. A. KUMAR and B. L. BHASKAR, “SPECTROSCOPIC AND VOLUMETRIC TECHNIQUES FOR THE ESTIMATION OF IVABRADINE IMPURITY 3,3’-(PROPANE-1,3-DIYL)BIS(7,8-DIMETHOXY-1,3,4,5-TETRAHYDRO-2H-BENZO[D]AZEPIN-2-ONE)”, Int J App Pharm, vol. 11, no. 3, pp. 216–218, May 2019.