1. Computergesteunde werkvoorbereiding voor mechanische werkstukken;Carlier,1983
2. A machining centre operation planning system;Carlier;Annals of CIRP,1985
3. Geometric reasoning — The key to integrated process planning;Chang,1990
4. Automatic recognition of machined surfaces from a 3-D solid model;Choi;Computer Aided Design,1984
5. Part features for process planning;Butterfield,1986