Chowdary, K.P.R., and K. Vijaya Deepthi. 2010. “A Comparative Evaluation of Cross Linked Starch Urea-A New Polymer and Other Known Polymers for Controlled Release of Glipizide”. Asian Journal of Chemistry 22 (7):5113-18. https://asianpubs.org/index.php/ajchem/article/view/11721.