E. S. Lee, S. H. Suh and J. W. Shon, “A Comprehensivemethod for Calibration of Volumetric Positioning Accuracy on CNC Machines,” The International Journal of Advanced Manufacturing Technology, Vol. 14, No. 1, 1998, pp. 43-49.
 Y. M. Ertekin and A. C. Okafor, “Vertical Machining Center Accuracy Characterization Using Laser Interferometer, Part 1. Linear Positional Errors,” Journal of Material Processing Technology, Vol. 105, No. 3, 2000, pp. 394-406.
 Y. Kakino, Y. Ihara and Y. Nakatsu, “The Measurement of Motion Errors of NC Machine Tools and Diagnosis of their Origins by Using Telescoping Magnetic Ball Bar Method,” Annals of the CIRP, Vol. 36, No. 1, 1987, pp. 377-380.
 Y. S. Tarng, J. Y. Kao and Y. S. Lim, “Identification of and Compensation for Backlash on the Contouring Accuracy of CNC Machine Center,” The International Journal of Advanced Manufacturing Technology, Vol. 13, No. 2, 1997, pp. 359-366.
 N. Srinnivasa, J. C. Ziegert and S. Smith, “Prediction of Position Errors of a Three Axis Machine Tool Using a Neural Network,” Proceedings of the Japan/USA Symposium on Flexible Automation, San Francisco, 1992, pp. 203-209.