Santhosh M, and Savithri S.R. “ Efficacy of Prolonged Speech Therapy in Persons With Stuttering: Perceptual Measures”. Journal of All India Institute of Speech and Hearing, Vol. 26, no. 1, Nov. 2007, pp. 18-22, http://203.129.241.91/jaiish/index.php/aiish/article/view/193.