Vikneswary Jayapal, Shamini Pathmanathan, Kasun Madhura Linayage, Kumaresan Magaswaran,. 2020. “Condition Monitoring Of Small Machines Using Piezo Transducers”. International Journal of Advanced Science and Technology 29 (1), 1359 -63. http://sersc.org/journals/index.php/IJAST/article/view/3700.