SNIGDHA, PATTNAIK, et al. “FORMULATION, EVALUATION AND SOLID-STATE THERMOGRAPHIC CHARACTERIZATION OF CFC FREE BECLOMETASONE DIPROPIONATE PRESSURIZED METERED DOSE INHALATION”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 6, no. 8, Aug. 2014, pp. 398-03, https://www.journals.innovareacademics.in/index.php/ijpps/article/view/1685.