The conference will take place at:
Centre Henri Piéron;
Université Paris Descartes;
71, avenue Edouard Vaillant;
92100 Boulogne-Billancourt Cedex;
If you book your hotel, make sure it is near to the network of metro stations. Then you could manage your transportation and connections to line 9.
RATP metro interactive map, nearest metro station (200 meters): Marcel Sembat, line 9. (direction towards 'Pont de Sèvres')