@INPROCEEDINGS{Harrer2013OpenSourceversus,
	author = {Simon Harrer and Jörg Lenhard and Guido Wirtz},
	title = {{Open Source versus Proprietary Software in Service-Orientation: The Case of BPEL Engines}},
	booktitle = {ICSOC},
	year = {2013},
	volume = {8274},
	series = {Lecture Notes in Computer Science},
	pages = {99--113},
	address = {Berlin, Germany},
	publisher = {Springer Berlin Heidelberg}
}