5Crowley M M, Schroeder B, Fredersdorf A, et al. Physicochemical properties and mechanism of drug release frome thylcellulose matrix tablets prepared by direct compression and hot-meh extrusion[J]. International Journal of Pharmaceutics, 2004,269 ( 2 ) : 509 - 522.
6Pearnchob N, Bodmeier R. Coating of pellets with micronized ethylcellulose particles by a dry powder coating technique [J]. International Journal of Pharmaceutics ,2003,268(1):1 -11.
7Wu P C, Huang Y B, Chang J I, et al. Preparation and evaluation of sustained release micrespheres of potassium chloride prepared with ethylcellulose [J]. International Journal of Pharmaceutics ,2003,260( 1 ) : 115 - 121.