Christine Chevallereau is Director of Research at the National Center for Scientific Research (CNRS) and is a researcher at the Institute of Research in Communication and Cybernetics, Nantes, France.

Guy Bessonnet is a Professor at the University of Poitiers and is a researcher at the Laboratory of Solid Mechanics at Poitiers, France.

Gabriel Abba is Professor of Automatic Control and Robotics at the National Engineer School of Metz and is a researcher at the Laboratory of Industrial Engineering and Mechanical Production, Metz, France.

Yannick Aoustin is an Associate Professor at the University of Nantes and is a researcher at the Institute of Research in Communication and Cybernetics, Nantes, France.