WEIBIGUE, Adoum Guelemine. Fertilizer subsidies and agricultural productivity in the Senegal River Valley. DEMO, Cracow, v. 5, n. 1, p. 101–114, 2021. DOI: 10.18559/RIELF.2021.1.5. Disponível em: https://ojs.fimagis.pl/index.php/demo/article/view/1199. Acesso em: 14 may. 2026.