*http://www.microsoft.com/architecture/default.aspx?pid=journal&abver=E9A00024-3DC1-4B6A-BC20-22716E4D2FEA

• http://msdn.microsoft.com/library/default.asp?url=/library/en-us/bts_2004wp/html/14bc36a8-69a9-48ed-8e4c-1c85202544c0.asp
• http://citforum.ru/internet/webservice/choreography/
• http://www.artima.com/weblogs/viewpost.jsp?thread=162149 by Bruce Eckel