1. Development of hollow microspheres as floating controlled-release systems for cardiovascular drugs: preparation and release characteristics;Soppimath;Drug Dev. Ind. Pharm.,2001
2. Floating drug delivery systems: an approach to oral controlled drug delivery via gastric retention;Singh;J. Control. Release,2000
3. Novel formulation approaches to oral mucoadhesive drug delivery systems;Akiyama,1999
4. W.J. Curatolo, J. Lo, Gastric retention system for controlled drug release. U.S. Patent 5, 443, 843, August 22, 1995.
5. Floating delivery and other potential gastric retaining systems, current status on targeted drug delivery to the gastrointestinal tract, Capsugel Library;Moes,1993