1. Institute of Robotics, Bulgarian Academy of Sciences, Bulgaria and
Department of Logopedics, South-West University “Neofit Rilski”, Bulgaria
2. Institute of Robotics, Bulgarian Academy of Sciences, Bulgaria
3. Institute of Robotics, Bulgarian Academy of Sciences, Bulgaria and
Faculty of Information Sciences , University of Library Studies and Information Technologies, Bulgaria
4. Department of Logopedics, South-West University “Neofit Rilski”, Bulgaria