8M.A. Wesley, et al. A Geometric Modeling System for Automated Mechanical Assembly [J]. IBM Journal of Research and Development, 1980, 24(1): 64~74.
9Homem de Mello, Sanderson A C. A Correct and Complete Algorithm for the Generation of Mechanical Assembly Sequences [J]. IEEE Transactions on Robotics and Automation, 1991, 7(2): 228~240.
10Lee K, Gossard D C. A Hierarchical Data Structure for Representing Assemblies: Part 1 [J]. Computer-Aided Design, 1985, 17(1): 15~19.