“Synthesis, characterization and development of validated RP-HPLC method for the estimation of process-related impurity diethyl 4-(3-chlorophenyl)-2, 6-dimethyl-1, 4-dihydropyridine-3, 5-dicarboxylate from amlodipine bulk and formulation”, Int J of Pharm Chem, vol. 5, no. 5, pp. 172–180, May 2015, doi: 10.7439/ijpc.v5i5.1984.