https://www.wto.org/english/res_e/reser_e/ullbergpresentation_e.pdf
https://www.ui.se/globalassets/ui.se-eng/publications/other-publications/the-limits-of-economic-coercion.pdf?utm_source=POLITICO.EU&utm_campaign=d3cc0cf4ef-EMAIL_CAMPAIGN_2021_12_02_09_59&utm_medium=email&utm_term=0_10959edeb5-d3cc0cf4ef-190380769
https://www.regjeringen.no/globalassets/upload/kilde/fkd/red/2004/0009/ddd/pdfv/228920-nilf_rapport_2004_9_s.pdf
https://www.wto.org/english/tratop_e/tpr_e/s434_e.pdf