Bonifacio Castaño Angel Moreno Melquiades Carbajo Javier de Pedro Artificial Intelligence and Bluetooth Techniques in a Multi-user M-learning Domain. 1-13 2008 5 Int. J. Comput. Sci. Appl. 1 http://www.tmrfindia.org/ijcsa/V5I11.pdf db/journals/ijcsa/ijcsa5.html#CastanoMP08