Pamu, Sandhya, et al. “Formulation of Gastro-Retentive Floating Tablets of Valsartan by 2 Power 2 Factorial Designs: In Vitro and In Vivo Evaluations”. International Journal of Pharmaceutical Sciences and Nanotechnology(IJPSN), vol. 12, no. 2, Mar. 2019, pp. 4496-05, doi:10.37285/ijpsn.2019.12.2.7.