Rao C V N. Quantification of Crystalline Linagliptin Form-A in Amorphous 5 mg Tablets using Calibration curve Method by using Powder X-Ray Diffraction (PXRD). ijpba [Internet]. 2017 Jul. 20 [cited 2024 May 3];8(2). Available from: http://ijpba.info/index.php/ijpba/article/view/1523