Ribeiro Ferrari, M. A., F. Neves Freitas, and N. H. Barbosa Filho. “The Real Exchange Rate and External Constraint: A Re-Reading Proposal With Endogenous Elasticity”. Brazilian Journal of Political Economy, vol. 33, no. 1, Jan. 2013, pp. 60-81, https://centrodeeconomiapolitica.org/repojs/index.php/journal/article/view/301.