1. AGWL http://dps.uibk.ac.at/projects/agwl/
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3. Andrews T et al 2003 Business process execution language for web services version 1.1 http://www-128.ibm.com/developerworks/library/specification/wsbpel/
4. ASKALON http://www.dps.uibk.ac.at/projects/askalon/