Source: Lustig, Hanno, Nick Roussanov and Adrien Verdelhan, Common Risk Factors in Currency Markets, Review of Financial Studies, November 2011, Vol. 24 (11), pp. 3731-3777 pdf (appendix).
Source: Lustig, Hanno and Adrien Verdelhan, The Cross-Section of Foreign Currency Risk Premia and US Consumption Growth Risk, American Economic Review, March 2007, vol. 97, No 1, pp 89-117, pdf.