Reports on Research and Conferences: Catalysis 92 in Warsaw. Nordic Journal of African Studies, [S. l.], v. 1, n. 2, p. 2, 1992. DOI: 10.53228/njas.v1i2.734. Disponível em: https://www.njas.fi/njas/article/view/734. Acesso em: 10 may. 2025.