Oliveira, Adilson de, and Márcio Silva de Araujo. “Brazilian Imports of Natural Gas in the Context of Mercosur”. Brazilian Journal of Political Economy 15, no. 4 (October 1, 1995): 21-37. Accessed December 6, 2022. https://centrodeeconomiapolitica.org.br/repojs/index.php/journal/article/view/1254.