Kumar, A. ., and N. . Goyal. “Design, Development and Evaluation of Extended Release Tablets of Anti-Asthmatic Agents Using Various Polymers”. International Journal of Research and Development in Pharmacy & Life Sciences, vol. 7, no. 4, Aug. 2018, pp. 3050 -54, doi:10.21276/IJRDPL.2278-0238.2018.7(4).3050-3054.