1. Tiwari SB, DiNunzio J, Rajabi-Siahboomi A. Drug polymer matrices for extended release. In: Wilson CG, Crowley PJ, editors. Controlled release in oral drug delivery. New York, NY: Springer; 2011. p. 131–59.
2. Dabbagh MA, Ford JL, Rubinstein MH, Hogan JE. Effects of polymer particle size, compaction pressure and hydrophilic polymers on drug release from matrices containing ethylcellulose. Int J Pharm. 1996;140:85–95.
3. Fallingborg J. Intraluminal pH of the human gastrointestinal tract. Dan Med Bull. 1999;46:183–96.
4. Dow Commercial Information. Using methocel cellulose ethers for controlled release of drugs in hydrophilic matrix systems. USA: The Dow Chemical Company; 2000. p. 1–36.
5. Gustafsson C, Bonferoni MC, Caramella C, Lennholm H, Nystrom C. Characterisation of particle properties and compaction behaviour of hydroxypropyl methylcellulose with different degrees of methoxy/hydroxypropyl substitution. Eur J Pharm Sci. 1999;9:171–84.