doi> GARAFFA, Rafael ; SZKLO, A. ; LUCENA, A. ; FERES, J. G. . Price Adjustments and Transaction Costs in the European Natural Gas Market. ENERGY JOURNAL, v. 40, p. 171-188, 2019.
doi> GARAFFA, Rafael ; SZKLO, A. ; LUCENA, A. ; FERES, J. G. . Price Adjustments and Transaction Costs in the European Natural Gas Market. ENERGY JOURNAL, v. 40, p. 171-188, 2019.