NWANGWU, George. A comparative analysis of the use of unsolicited proposal for the delivery of public-private partnership projects in Africa. Journal of Sustainable Development Law and Policy, [S. l.], v. 10, n. 2, p. 207–226, 2020. Disponível em: https://jsdlp.ogeesinstitute.edu.ng/jsdlp/article/view/161. Acesso em: 23 mar. 2026.