Marco Aiello Johan van Benthem E. el Khoury Visualizing Compositions of Services from Large Repositories. 359-362 2008 CEC/EEE http://dx.doi.org/10.1109/CECandEEE.2008.149 conf/wecwis/2008 db/conf/wecwis/cec2008.html#AielloBK08