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"Inform, create, govern: some of the functions of correspondence throughout the ages" at the University of Reims - October 2003.
“Power, resistance and tension. History of electrical mobility (19th-21st centuries)” – International conference, Paris, Institut des Sciences de la Communication du CNRS, June 2012
“Actors and uses of the political surveillance, 19th – 20th centuries”, university of Bordeaux, April 2008, ANR Program 2006 – 2010 Opened information, closed information.