@congreso_internacional{541, author = {Francisco Herrera and Luis Martínez and Pedro José Sánchez and Enrique Herrera-Viedma}, title = {Management of Heterogeneous information in Group Decision Making}, year = {2002}, month = {July 1-5th}, publisher = {Ninth International Conference on Information Processing and Management of Uncertainty in Knowledge-Bases Systems. IPMU 2002}, address = {, Annecy (France)}, }