David R. Friend

MASRx and COSRx Sustained-Release Technology

Syed A. Altaf, David R. Friend, D. Friend, 2002 .

In vitro skin permeation techniques

David R. Friend, D. Friend, 1992 .

Drug delivery to the small intestine

David R. Friend, D. Friend, 2004, Current gastroenterology reports.

In Vitro Evaluation of Dexamethasone-β-D-Glucuronide for Colon-Specific Drug Delivery

Barbara Haeberlin, David R. Friend, W. Rubas, 1993, Pharmaceutical Research.

Guar Gum-Based Sustained Release Diltiazem

Syed A. Altaf, David R. Friend, D. Friend, 1998, Pharmaceutical Research.