Savithri S.R., Jayaram M, Venugopal M.B., and Rajasudhakar R. “Base of Articulation of 13 Indian Languages”. Journal of All India Institute of Speech and Hearing, Vol. 26, no. 1, Nov. 2007, pp. 23-27, http://203.129.241.91/jaiish/index.php/aiish/article/view/192.