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D.  Portugal and Rocha, R., ?A Survey on Multi-Robot Patrolling Algorithms?, in Proc. of 2nd Doctoral Conference on Computing, Electrical and Industrial Systems (DoCEIS'11), Costa da Caparica, Lisbon, Portugal, 2011.\par \par R.  Rocha, Dias, J., and Carvalho, A., ?Cooperative Multi-Robot Systems: a study of Vision-based 3-D Mapping using Information Theory?, Robotics and Autonomous Systems, vol. 53, pp. 282-311, 2005.\par \par R.  Rocha, Cunha, A., Varandas, J., and Dias, J., ?Towards a New Mobility Concept for Cities: Architecture & Programming of Semi-Autonomous Electric Vehicles?, Industrial Robot, vol. 34, pp. 142-149, 200AD.\par \par }