1. Department of Computer, Control and Management Engineering, Sapienza University of Rome, Rome, Italy
2. Department of Cognitive Robotics, Delft University of Technology, Delft, The Netherlands
3. Institute Mines Telecom Atlantique, Nantes, France
4. Khalifa University Center for Autonomous Robotics System (KUCARS) and the Department of Mechanical and Nuclear Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates