Vorasri, M. , Jirapattarasilp, K. , Kaewkuekool, S. (2011). 'The Effect of High-speed Milling on Surface Roughness of Hardened Tool Steel'. World Academy of Science, Engineering and Technology, Open Science Index 59, International Journal of Mechanical and Mechatronics Engineering, 5(11), 2422 - 2425.