1. Braga, R.A.M., Petry, M., Moreira, A.P., Reis, L.P.: Intellwheels: A Development PlatForm for Intelligent Wheelchairs for Disabled People. In: Proc. of the 5th Int. Conf. on Informatics in Control, Aut. and Robotics., May 2008, vol. I, pp. 115–121 (2008)
2. Braga, R.A.M., Petry, M., Moreira, A.P., Reis, L.P.: Concept and Design of the Intellwheels Platform for Developing Intelligent Wheelchairs. In: Informatics in Control, Aut. and Robotics, vol. 37, pp. 191–203 (April 2009)
3. EN 50159-2, Railway applications – Communication, signaling and processing systems, Part 2: Safety related communication in open transmission systems. In: Vol. Europ. Commitee for Electr. Standardization (March 2001)
4. Wiley Series in Agent Technology;F.L. Bellifemine,2007
5. FIPA, Found. for Intelligent Physical Agents (October 2009),
http://www.fipa.org