
https://theconversation.com/el-espanol-una-lengua-americana-228150

https://www.global-counsel.co.uk/sites/default/files/analysis/insight/download/Hard%20and%20Soft%20Political%20Risk.pdf

https://www.zi-mannheim.de/fileadmin/user_upload/downloads/forschung/forschungsverbuende/MHG-Studie-Endbericht-Zusammenfassung.pdf