Panchaxari M. Dandagi, Navik V. Koradia, Anand P. Gadad, Vinayak S. Mastiholimath, and Mayank M. Sanghvi, “Oral osmotic drug delivery system: An update”, Int. J. Res. Pharm. Sci., vol. 2, no. 2, pp. 225–236, Jun. 2011.