1. ebXML website (2003),
http://www.ebXML.org
2. eCl@ss website (2003),
http://www.eclass.de
3. UNSPSC website (2003),
http://www.unspsc.net
4. An assessment of services trade and liberalization in the united states and developing economies. World Trade Organization, Council for Trade in Services, 31, Document TN/S/W/12, available via (March 2003),
http://www.wto.org/english/docs_e/docs_e.htm
(last visited February 2004)
5. Andrews, T., Curbera, F., Dholakia, H., Goland, Y., Klein, J., Leymann, F., Liu, K., Roller, D., Smith, D., Trickovic, I., Weerawarana, S.: Business Process Execution Language for Web Services Version 1.1.2003,
http://www-106.ibm.com/developerworks/webservices/library/ws-bpel/
(last visited February 2004)