Hung, J. , Lai, Y. , Luo, T. , Hsiao, H. (2012), 'Prediction of the Dynamic Characteristics of a Milling Machine Using the Integrated Model of Machine Frame and Spindle Unit', World Academy of Science, Engineering and Technology, Open Science Index 67, International Journal of Mechanical and Mechatronics Engineering, 6(7), 1234 - 1240.