Robert B. Piotter Tom Kirkham Julian R. Gallop Ian J. Johnson Damian Mac Randal Brian Ritchie A Semantic Approach to Enhance Service Composition in Workflows that use Mobile Services. 731-742 2007 conf/ccgrid/2007 CCGRID http://dx.doi.org/10.1109/CCGRID.2007.10 db/conf/ccgrid/ccgrid2007.html#PiotterKGJRR07