Scott A. Hissam, Barbara Russo, Manoel Gomes de Mendonça Neto, Fabio Kon: Open Source Systems: Grounding Research - 7th IFIP WG 2.13 International Conference, OSS 2011, Salvador, Brazil, October 6-7, 2011. Proceedings. IFIP Advances in Information and Communication Technology 365, Springer 2011, ISBN 978-3-642-24417-9