Louis Denis Kevin Catherine and  Raja Aziz Raja Ma’arof and  Azrina Arshad and  Sangeeth Suresh,  Impact of Machining Parameters on the Surface Roughness of Machined PU Block.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 96(12). 1476 - 1481
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10000210.