Izvješće žalbenog tijela, DS 296, točka 115.
A. Bouet, C. Estrades och D. Laborde, ”Differential Export Taxes along the Oilseeds Value Chain: A Partial Equilibrium Analysis”, American Journal of Agricultural Economics, 2014, s. 924, https://academic.oup.com/ajae/article/96/3/924/2737494