GIELFI, G. G.; PEREIRA, N. M.; GOMES, R.; FORNARI, V. C. de B. User-Producer Interaction in the Brazilian Oil Industry: The Relationship between Petrobras and its Suppliers of Wet Christmas Tree. Journal of Technology Management & Innovation, Santiago, Chile, v. 8, p. 117–127, 2013. DOI: 10.4067/S0718-27242013000300066. Disponível em: https://www.jotmi.org/index.php/GT/article/view/1194. Acesso em: 22 may. 2022.