P.Vinay Kumar, K.Ashwin Kumar and D.Karthikeyan 2022. Formulation and evaluation of controlled porosity osmotic pump for oral delivery of valsartan. IJPAR JOURNAL. 6, 4 (Oct. 2022), 597–604. DOI:https://doi.org/10.61096/ijpar.v6.iss4.2017.597-604.