Seyyed Vahid Hashemian Farhad Mavaddat A Graph-Based Framework for Composition of Stateless Web Services. 75-86 2006 conf/ecows/2006 ECOWS http://doi.ieeecomputersociety.org/10.1109/ECOWS.2006.2 db/conf/ecows/ecows2006.html#HashemianM06