Anil Kumar Gupta3 *Dhruba S. G. N. U. S. G. N. M. “Permeation Enhancer for TDDS from Natural and Synthetic Sources: A Review”. Journal of Biomedical and Pharmaceutical Research, Vol. 2, no. 1, Feb. 2013, http://jbpr.in/index.php/jbpr/article/view/447.