M. Basem-Hassan Lomabrdi, A. H. Juma’h, F. Cué García, Ángel L. Ruiz Mercado, and A. A. Lloréns Rivera, “Foreign direct investment, exports, Gross Domestic Product and the labor market in Puerto Rico”, ecos.econ., vol. 16, no. 35, pp. 5–28, Dec. 2012.