The world atlas of backbone operators / Jean-Charles Doineau, Julien Grivolas, Carole Manero
Business VoIP market : opportunities & challenges / Fréderic Faivre, Julien Grivolas, Bruno Teyton
WiMAX in emerging markets [documento electrónico] : the opportunity assessed / Angel Dobardviev, Julien Grivolas, Deepika Chaubey