Affiliation: | 1. Institute for Systems and Robotics, Polo II, 3030-290 Coimbra, Portugal;2. INRIA Rennes Bretagne Atlantique, campus de Beaulieu, 35042 Rennes Cedex, France;3. Institut Pascal/IFMA, Institut Pascal, BP 10448, F-63000 Clermont-Ferrand, France |