LUBNA SHAIKH, VISHAL PANDE, and DEEPAK MUSMADE. 2015. “SYNTHESIS, CHARECTERIZATION, DEVELOPMENT AND VALIDATION OF RP-HPLC METHOD FOR PROCESS RELATED IMPURITY IN NIMODIPINE BULK AND FORMULATION”. International Journal of Pharmaceutics and Drug Analysis 3 (6):207-13. https://www.ijpda.org/index.php/journal/article/view/159.