http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:12016P/TXT&from=EN
http://www.debtwire.com/pdf/EuropeanNPLFY18!.pdf
https://icsid.worldbank.org/sites/default/files/documents/Code_of_Conduct_V3_Comments_by_State_Commenter.pdf
https://www.intaxwetrust.org/