1. Abor, J. (2005). Managing foreign exchange risk among Ghanaian firms. Academic Press.
2. AICEP - Agência para o Investimento e Comércio Externo de Portugal. (2010). Retrieved August 31, 2018, from http://www.portugalglobal.pt/PT/Internacionalizar/Paginas/bemvindos_internacionalizar.aspx
3. AICEP - Agência para o Investimento e Comércio Externo de Portugal. (2015). Portugal Global Angola – Ficha de Mercado. Retrieved August 31, 2018, from http://www.portugalglobal.pt/PT/Biblioteca/Paginas/Detalhe.aspx?documentId=c394b4f8-db0b-4d6a-b38c-95ed9a940b5d
4. Alves, M., Teixeira, N., & Rita, R. (2006). Foreign exchange risk: Management and disclosure of information. The case of PSI20 companies. Paper presented at XII Encontro AECA, Córdoba.
5. BCP - MILLENNIUM BCP. (2015). Retrieved September 4, 2015 from http://corp.millenniumbcp.pt/pt/public/solucoesfinanceiras/riscofinanceiro/riscodetaxadejuro/Pages/OpcoesDeTaxaDeJuro.aspx