"Further reading" section in SpecGL

I've added a "Further reading" section in SpecGL with the following
references:
- Making Better Standards, ETSI Protocol and Testing Competence Centre,
http://portal.etsi.org/mbs/ .
- What is a good standard?, B. Bos, 6 March 2003,
http://www.w3.org/People/Bos/DesignGuide/introduction .
- The essentials of a specification, T. Berners-Lee, 24 May 1999,
http://www.w3.org/1999/09/specification .
- IETF RFC 2360: Guide for Internet Standards Writers, G. Scott, Editor,
June 1998, http://www.ietf.org/rfc/rfc2360.txt .

Please let me know if there are any additional references you would like
to see there.

Dom
-- 
Dominique Hazaël-Massieux - http://www.w3.org/People/Dom/
W3C/ERCIM
mailto:dom@w3.org