1. G. T. Armstrong, “A Study of Automatic Generation of Non-Invasive NC Machine Paths from Geometric Models,” Ph.D. Dissertation, University of Leeds, Leeds, England, 1982.
2. G. T. Armstrong, M. Susan Bloor, A de Pennington and J. S. Swift, “Computer Representations of Parts in Mechanical Engineering,” Eurographics 79, International Conference and Exhibition, Bologna, Italy, October 1979.
3. APT IV Computer System Manual, Vol. 2. Subroutine Library (A4V3), Computer Aided Manufacturing—International Inc., Arlington, Texas.
4. W. A. Hunt and H. B. Voelcker, “An Exploratory Study of Automatic Verification of Programs for Numerically Controlled Machine Tools,” Technical Memo No. 34, Production Automation Project, University of Rochester, Rochester, New York, 1982.
5. H. Persson, “NC Machining of Arbitrarily Shaped Pockets,” Computer Aided Design, Vol. 10. No. 3. May 1978, pp. 169–174.