Ivana Turnu Marco Melis Alessandra Cau Alessio Setzu Giulio Concas Katiuscia Mannaro Modeling and simulation of open source development using an agile practice. 610-618 2006 52 Journal of Systems Architecture 11 http://dx.doi.org/10.1016/j.sysarc.2006.06.005 db/journals/jsa/jsa52.html#TurnuMCSCM06