Ángel Martin, M. ., W. Rojas, J. L. . Eráusquin, D. . Yupanqui, and Édgar . Vera. “Derivatives Usage by Non-Financial Firms in Emerging Markets: The Peruvian Case”. Journal of Economics, Finance and Administrative Science, vol. 14, no. 27, Dec. 2009, pp. 73-86, doi:10.46631/jefas.2009.v14n27.05.