Asad Masood Khattak Zeeshan Pervez A. M. Jehad Sarkar Young-Koo Lee Service Level Semantic Interoperability. 387-390 2010 SAINT http://doi.ieeecomputersociety.org/10.1109/SAINT.2010.54 conf/saint/2010 db/conf/saint/saint2010.html#KhattakPSL10