Rakesh Kumar Sharma, Navneet Sharma, Sudha Rana, and Hosakote G. Shivkumar. 2013. “Solid Lipid Nanoparticles As a Carrier of Metformin for Transdermal Delivery”. International Journal of Drug Delivery 5 (2):137-45. https://ijdd.arjournals.org/index.php/ijdd/article/view/191.