GYAMFI, Timothy Adu; BOADAA, Richmond; ADU-FOSU, Benjamin. Risk Analysis of Procurement Options: Implications for Construction Firms in Ghana. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 28, n. 1, p. 90–102, 2016. Disponível em: https://gssrr.org/JournalOfBasicAndApplied/article/view/5163. Acesso em: 27 oct. 2025.