Mehulkumar P, R M, Middha A. Na-Tpp Cross-Linked Chitosan Microspheres for Controlled Release Of Tramadol Hydrochloride. Asian J Pharm Res Dev [Internet]. 2013 Jan. 1 [cited 2024 May 16];1(1):86-95. Available from: https://ajprd.com/index.php/journal/article/view/18