Naeem Esfahani Sam Malek João Pedro Sousa Hassan Gomaa Daniel A. Menascé A Modeling Language for Activity-Oriented Composition of Service-Oriented Software Systems. 591-605 2009 MoDELS http://dx.doi.org/10.1007/978-3-642-04425-0_46 conf/models/2009 db/conf/models/models2009.html#EsfahaniMSGM09