GIESECKE, Carlos R. The problem of energy crisis in Peru: oil contracts, petroleum prices and related topics. Apuntes. Social Sciences Journal, [S. l.], n. 17, p. 25–46, 1985. DOI: 10.21678/apuntes.17.216. Disponível em: https://revistas.up.edu.pe/apuntes/article/view/216. Acesso em: 12 sep. 2026.