@article {berger.ea:2014:ecosystems,
	title = {Variability Mechanisms in Software Ecosystems},
	journal = {Information and Software Technology},
	volume = {56},
	year = {2014},
	chapter = {1520-1535},
	attachments = {http://gsd.uwaterloo.ca/sites/default/files/ist14-berger-ecosystems.pdf},
	author = {Thorsten Berger and Rolf-Helge Pfeiffer and Reinhard Tartler and Dienst, Steffen and Krzysztof Czarnecki and Andrzej W{\k a}sowski and She, Steven}
}