Jampana, S. V., P. C. Kakumani, V. E, and C. Paul. “3 Axial Positioning System For Large Work Spaces”. International Journal of Technical Innovation in Modern Engineering & Science, vol. 5, no. 4, Dec. 2021, pp. 597-00, https://ijtimes.com/IJTIMES/index.php/ijtimes/article/view/2840.