P.Vinay Kumar, K.Ashwin Kumar, and D.Karthikeyan. “Formulation and Evaluation of Controlled Porosity Osmotic Pump for Oral Delivery of Valsartan”. International Journal of Pharmacy and Analytical Research, vol. 6, no. 4, Oct. 2022, pp. 597-04, doi:10.61096/ijpar.v6.iss4.2017.597-604.