Christoph Kiefer Abraham Bernstein Hong Joo Lee Mark Klein Markus Stocker Semantic Process Retrieval with iSPARQL. 609-623 2007 conf/esws/2007 ESWC http://dx.doi.org/10.1007/978-3-540-72667-8_43 db/conf/esws/eswc2007.html#KieferBLKS07