https://www.ice.it/it/repository/archivio_rapporti/Rapporto_Ice_2016%20-2017_web.pdf
...https://www.wto.org/ english/tratop_e/tpr_e/g342_e.pdf. Wto (2017), Annual Report 2017, https://www.wto.org/english/res_e/booksp_e/anrep_e/anrep17_e
www.ice.it/it/repository/archivio_rapporti/Rapporto_Ice_2016%20-2017_web.pdf (size - 22,580k)