REFERENCES
- A. Y. Benkorah, and J. N. Mcmullen. (1994). Biconcave coated, centrally perforated tablets for oral controlled drug delivery. J. Control. Release 32 (2):155–160.
- C. M. Chen, and J. C. H. Chou. (1998). Once daily pharmaceutical tablet having a unitary core. U.S. Patent No. 5,837,379.
- C. M. Chen, D. Y. Lee, and J. Xie. (1998). Controlled release formulation for water insoluble drug in which a passageway is formed in situ. U.S. Patent No. 5,736,159.
- R. Cortese, B. Barclay, and F. Theeuwes. (1984). Simultaneous delivery of two drugs from unit delivery device. U.S. Patent No. 4,449,983.
- A. Hansson, A. Giardino, J. Cardinal, and W. Curatolo. (1988). Perforated coated tablets for controlled release of drugs at a constant rate. J. Pharm. Sci. 77 (4):322–324.
- L. Liu, G. Khang, J. M. Rhee, and H. B. Lee. (2000a). Monolithic osmotic tablet system for nifedipine delivery. J. Control. Release 67:309–322.
- L. Liu, J. Ku, G. Khang, H. Lee, J. M. Rhee, and H. B. Lee. (2000b). Nifedipine controlled delivery by sandwiched osmotic tablet system. J. Control. Release 68:145–156.
- E. X. Lu, Z. Q. Jiang, Q. Z. Zhang, and X. G. Jiang. (2003). A water-insoluble drug monolithic osmotic tablet system utilizing gum Arabic as an osmotic, suspending expanding agent. J Control. Release 92:375–382.
- V. P. Shah, Y. Tsong, P. Sathe, and J. Liu. (1998). In vitro dissolution profile comparison—statistics and analysis of the similarity factor, f 2. Pharma. Res. 15 (6):889–896.
- F. Theeuwes. (1975). Elementary osmotic pump. J. Pharm. Sci.. 64:1987–1991.
- F. Theeuwes. (1978). Osmotic system for delivering selected beneficial agents having varying degrees of solubility. U.S. Patent No. 4,111,201.
- F. Theeuwes, and T. Higuchi. (1972). Osmotic dispensing device for releasing beneficial agent. U.S. Patent No. 3,845,770.
- A. G. Thombre, L. E. Appel, M. B. Chidlaw, P. D. Daugherity, F. Dumont, L. A. F. Evans, and S. C. Sutton. (2004). Osmotic drug delivery using swellable-core technology. J. Control. Release 94:75–89.
- R. Verma, D. M. Krishna, and S. Garg. (2002). Formulation aspect in the development of osmotically controlled oral drug delivery systems. J. Control. Release 79:7–27.
- R. Verma, B. Mishra, and S. Garg. (2000). Osmotically controlled oral drug delivery. Drug Dev. Ind. Pharm. 26 (7):695–708.