Ibba Hamed, I. (1992). Essai d’implication d’assurance des risques agricoles au Niger [Master Thesis, Institut International des Assurances (IIA)]. http://97.74.90.84/pmb/scan_iia/scan_lyd/Essai_Implantation_Assurance_IBBA_HAMED_IBRAHIM_DESA_0001.pdf