1. http://www.ap242.org/, 2016-01-18.
2. ISO/ASTM 52915:2013 Standard specification for additive manufacturing file format (AMF) Version 1.1.
3. ASTM Additive Manufacturing File Format (AMF) http://amf.wikispaces.com/, 2016-01-18.
4. Hod Lipson, Additive Manufacturing File Formats, http://fab.cba.mit.edu/classes/S62.12/docs/formats.ppt, http://www.nist.gov/el/msid/infotest/upload/Lipson-Cornell-NIST-AMF.pdf, 2016-01-18.
5. 3D Manufacturing Format - Core Specification & Reference Guide Version 1.0 http://www.3mf.io/wpcontent/uploads/2015/04/3MFcoreSpec_1.0.1.pdf, 2016-01-18.