Aroskar, R., S. K. Sarkar, and P. E. Swanson, (2004), “European Foreign Exchange Market Efficiency: Evidence Based on Crisis and Noncrisis Periods,” International Review of Financial Analysis, Vol. 13, pp. 333-347.
Bakshi, G., P. Carr, and L. Wu, (2008), “Stochastic Risk Premiums, Stochastic Skewness in Currency Options, and Stochastic Discount Factors in International Economies,” Journal of Financial Economics, Vol. 87, pp. 132-156.