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The links below are to outdated versions of the GSBPM, retained for archive purposes only.
- Version 4.0 (2009)
- Version 3.1 (December 2008) (PDF file - presented at the METIS Workshop, Lisbon, March 2009)
- Version 2.0 (August 2008) (PDF file - circulated for comments during Autumn 2008)
- Version 1.0 (March 2008) (PDF file - presented at the METIS Work Session, Luxembourg, April 2008)