http://www.ecfr.eu/article/commentary_there_is_life_for_the_eu_after_brexit
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/643924/Foreign_policy__defence_and_development_paper.pdf
http://library.fes.de/pdf-files/bueros/suedafrika/02828.pdf
https://onlinelibrary.wiley.com/doi/epdf/10.1111/1467-923X.13172