@article {3287,
	title = {Offene {\"O}kosysteme f{\"u}r OER},
	year = {2013},
	pages = {28-30},
	url = {http://www.uni-hamburg.de/eLearning/eCommunity/Hamburger_eLearning_Magazin/eLearningMagazin_11.pdf},
	author = {Heinen, Richard and Michael Kerres and Ingo Blees and Rittberger, Marc}
}
