Layout converters:
File format descriptions:
- Caltech Intermediate Format (CIF)
- Caltech Intermediate Format (CIF) by Steven M. Rubin
- Calma GDS-II Format by Steven M. Rubin
- GDS-II description by Klaas Holwerda
- Oasis File Format Draft Specification
- AutoCAD 2012 DXF Reference
- A First Guide to PostScript
- The Gerber File Format Specification
Software development:
- TMS software components CleWin could not exist without these excellent components
- Boolean CleWin’s polygon operations are based on this algorithm by Klaas Holwerda