Premchand, T.A., and B.B. Barik. “Preparation and Statistical Optimization of Alginate Based Stomach Specific Floating Microcapsules of an Antihypertensive Agent”. Asian Journal of Chemistry, vol. 24, no. 11, June 2012, pp. 5050-4, https://asianpubs.org/index.php/ajchem/article/view/9859.