1. Is gold a hedge or a safe haven? an analysis of stocks, bonds and gold;Baur;The Finan Rev,2010
2. Briere, M., Oosterlinck, K., Szafarz, A. (2013). “Virtual currency, tangible return: portfolio diversification with bitcoins”, in: Proceedings of SSRN working paper series.
3. Gold as a hedge against the dollar;Capie;J. Int. Finan. Markets, Instit. Money,2005
4. Coindesk (2015). “Bitcoin price index” URL: http://www.coindesk.com/price/bitcoin-price-index/ Accessed May 2015.
5. Gandal, N., Halaburda, H. (2014) “Competition in cryptocurrency market” NET Institute Working Paper No. 14-17. URL: http://papers.ssrn.com/sol3/papers.cfm?abstract_id=2506463.