Srinija, Gandla. “Method Development and Validation for the Simultaneous Determination of Perphenazine and Amitriptyline in Pure and Marketed Pharmaceutical Dosage Form by Using RP-HPLC”. INTERNATIONAL JOURNAL OF APPLIED PHARMACEUTICAL SCIENCES AND RESEARCH 7, no. 03 (June 28, 2022): 43-51. Accessed December 6, 2022. https://sierrajournals.com/index.php/IJAPSR/article/view/1075.