Romain Laborde Michel Kamel François Barrère Abdelmalek Benzekri A secure collaborative web based environment for virtual organizations. 723-730 2007 ICDIM http://dx.doi.org/10.1109/ICDIM.2007.4444310 conf/icdim/2007 db/conf/icdim/icdim2007.html#LabordeKBB07