Campuzano Bolarín, F., A. Guillamón Frutos, and A. Lisec. “Assessing the Impact of Prices Fluctuation on Demand Distortion Within a Multi-Echelon Supply Chain”. Promet - Traffic&Transportation, Vol. 23, no. 2, Jan. 2012, pp. 131-40, doi:10.7307/ptt.v23i2.140.