Roma, Nuova Cultura, March 2014, 357 p.
In: IAI Research Papers 14
Willem Pieter de Groen
Roma, Istituto affari internazionali, 2013, 76 p.
In: Sharaka Papers Research Paper 4
Links[1] https://www.iai.it/en/persone/willem-pieter-de-groen [2] https://www.iai.it/en/pubblicazioni/c20/bridging-gulf [3] https://www.iai.it/en/pubblicazioni/c37/banking-and-insurance-gcc-countries