Visit the Publication page on Drugdel.com

Journal of Controlled Release
Advanced Drug Delivery Reviews
Drug Delivery
Polymer degradation and stability
Medical Devices..
ACS publications
You can also check out the ACS publications
And Elsevier..
Dr. Paul Steward's Home Page
This home page gives a very good review article on polymeric drug delivery and also supplies a huge list of relevant references
References
Here's a list of some good review articles which I found very informative.