Here are two additional articles:
The Role of Declining Beta Cell Function in the Progression of Type 2 Diabetes: Implications for Outcomes and Pharmacological Management
http://www.diabetes.ca/documents/for-professionals/CJD--Sept_2003--Smiley,_T.pdf
Early Use of Insulin to Improve Beta Cell Preservation
http://www.diabetesincontrol.com/articles/reatures/11534