Jamaludin, A. S., M. N. M. Razali, N. Jasman, A. N. A. Ghafar, and M. A. Hadi. “Design of Spline Surface Vacuum Gripper for Pick and Place Robotic Arms”. Journal of Modern Manufacturing Systems and Technology, vol. 4, no. 2, Sept. 2020, pp. 48-55, doi:10.15282/jmmst.v4i2.5181.