1. WTO: Yemen to become 160th WTO member, 27 May 2014. World Trade Organization.
https://www.wto.org/english/news_e/news14_e/acc_yem_27may14_e.htm
2. Dab, S., Ramachandran, S., Chandna, R., Ravi, H., Grealish, A., Maarten, P.: Digital Revolution in Trade Finance, 30 August 2016. Boston Consulting Group.
https://www.bcg.com/publications/2016/digital-revolution-trade-finance.aspx
3. Basimanyane, D.K.: The legal implications of electronic letter of credit as a cross border trade payment mechanism. Master thesis, University of Pretoria (2016)
4. YCB: Financial Statements. Yemen Commercial Bank, Sana’a (2010, 2011, 2012, 2013, 2014 and 2015)
5. TIIB: Financial Statements. Tadhamon International Islamic Bank, Sana’a (2010, 2011, 2012, 2013, 2014 and 2015)