Hong, C.-C., C.-L. Chang, C.-C. Huang, C.-C. Yang, and C.-Y. Lin. “CAE Analysis of Secondary Shaft Systems in Great Five-Axis Turning-Milling Complex CNC Machine”. Advances in Technology Innovation, Vol. 3, no. 1, Oct. 2017, pp. 43-50, http://ojs.imeti.org/index.php/AITI/article/view/521.