De Avila Arroyo JP, Yago M, Nasir MA, Wu J. Strategic Alliance in Energy Sector & Implications for Economic Growth and Technical Efficiency: The Case of Petrobras and Galp. IJEEP [Internet]. 2014 Oct. 15 [cited 2024 May 19];4(4):759-71. Available from: https://econjournals.com/index.php/ijeep/article/view/953