Annamdas Radhika, Madhav, Venu Gopal Madhav Annamdas, and Yaowen Yang. 2012. “Application of Piezoceramic Transducers for 3D Impedance Modelling in Damage Assessment of Plate”. Pure and Applied Science Advances 1 (3):144-61. http://www.sjournals.com/index.php/sjpas/article/view/1016.