G. Kannan, S. Abhinavkarthik, P. A. Dharanidharan, M. Dineshkumar, & R. Gobi. (2021). Design and fabrication of 3D printer and hand writing machine. International Journal of Intellectual Advancements and Research in Engineering Computations, 7(2), 2529–2533. https://doi.org/10.61096/ijiarec.v7.iss2.2019.2529-2533