Rozeena Nigar Osman and G. GaneshKumar 2022. Development and evaluation of push pullosmotic pump tablets of valsartan by using ntural polymers. IJPAR JOURNAL. 8, 4 (Sep. 2022), 463–471. DOI:https://doi.org/10.61096/ijpar.v8.iss4.2019.463-471.