Henner Gimpel Heiko Ludwig Asit Dan Robert Kearney PANDA: Specifying Policies for Automated Negotiations of Service Contracts. 287-302 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2910&spage=287 2003 conf/icsoc/2003 ICSOC db/conf/icsoc/icsoc2003.html#GimpelLDK03