Rozeena Nigar Osman, and G. GaneshKumar. “Development and Evaluation of Push Pullosmotic Pump Tablets of Valsartan by Using Ntural Polymers”. IJPAR JOURNAL, vol. 8, no. 4, Sept. 2022, pp. 463-71, doi:10.61096/ijpar.v8.iss4.2019.463-471.