1. Chang, T. C. (1982) TIPPS?A totally integrated process planning system, Ph.D. Thesis, Virginia Polytechnic Institute, Blacksburg, VA.
2. Choi, B. K. (1982) CAD/CAM compatible tool-oriented process planning system, Ph.D. Dissertation, School of Industrial Engineering, Purdue University, West Lafayette, IN.
3. Dunn, M. S. and Mann, M. S. (1978) Computerized production process planning, inProceedings of 15th Numerical Control Society Annual Meeting and Technical Conference, Chicago, IL.
4. El-Midany, T. T. and Davies, B. J. (1981) AUTOCAP?A dialogue system for planning the sequence of operations for turning parts.International Journal of Machine Tool Design,21(3/4), 175?191.
5. Guisti, F., Santochi, M. and Dini, G. (1989) Kaplan: a knowledge-based approach to process planning of rotational parts.Annals of the CIRP,38(1), 481?484.