Sravanthi Todasam, and Nagarajan Srinivasan. “Formulation Optimization and in Vitro Evaluation for the Gastro Retentive Tablets of Labetolol”. IJPAR JOURNAL, vol. 5, no. 2, May 2016, pp. 324-32, doi:10.61096/ijpar.v5.iss2.2016.324-332.