A Median weighted product method for group decision supportZo¨ınabo SAVADOGO, Stephane Aimé METCHEBON TAKOUGANG , Fredéric NIKIEMA and Somdouda SAWADOGONEW COLLECTIVE AGGREGATION FUNCTION OF ADDITIVE VALUE FUNCTIONS BY THE QUADRATIC MEANZoïnabo Savadogo , Saïdou Ouedraogo , Frédéric Nikiema , Somdouda Sawadogo and Blaise Some |