CALVO, Ángel. Cooperative Efforts and the Stages Previous to Internationalization: The Case of Telefónica. Apuntes. Social Sciences Journal, [S. l.], v. 41, n. 75, p. 211–241, 2014. DOI: 10.21678/apuntes.75.721. Disponível em: https://revistas.up.edu.pe/apuntes/article/view/721. Acesso em: 14 sep. 2026.