P. Sundar Singh Sivam, S. et al. 2018. Development of Vibrator Feeding Mechanism Using Two Sets of Rollers for the Separation of Ball Grading For Industry Benefits. International Journal of Engineering & Technology. 7, 4.5 (Sep. 2018), 202–206. DOI:https://doi.org/10.14419/ijet.v7i4.5.20045.