Birchall, J C A comparison of the puncturing properties of gelatin and hypromellose capsules for use in dry powder inhalers. [electronic resource] - Drug development and industrial pharmacy Aug 2008 - 870-6 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1520-5762 Standard No.: 10.1080/03639040801928903 doi Subjects--Topical Terms: Capsules--chemistryGelatin--chemistryHypromellose DerivativesMethylcellulose--analogs & derivativesNebulizers and VaporizersPowdersWater--chemistry