Free Software Magazine is the free online magazine about free software. It is free to subscribe and free to read online. Please, feel free to read all of our issues, book reviews, newsletters, and blog entries and participate in our forums. We now have hu
H. Müller, and H. Maurer. Proceedings of the 4th ACM workshop on Online books, complementary social media and crowdsourcing, page 25--34. New York, NY, USA, ACM, (2011)