Sanjay E. Sarma The crossing function and its application to zig-zag tool paths. [Citation Graph (0, 0)][DBLP] Computer-Aided Design, 1999, v:31, n:14, pp:881-890 [Journal]
Sheik Meeran, J. Mohd Taib A generic approach to recognising isolated, nested and interacting features from 2D drawings. [Citation Graph (0, 0)][DBLP] Computer-Aided Design, 1999, v:31, n:14, pp:891-910 [Journal]