International Institute of Tropical Agriculture. (1980). IITA root and tuber improvement program: staff papers 1977/78. Ibadan, Nigeria: IITA, (p. 33).
ICRISAT, - (2009) Guinea-race Sorghum Hybrids: Bringing the benefits of hybrid technology to a staple crop in Africa. Documentation. International Crops Research Institute for the Semi-Arid Tropics, Patancheru, Andhra Pradesh, India
International Food Policy Research Institute (IFPRI), 'Relatório sobre a nutrição mundial 2015: Iniciativas e responsabilização para o progresso da nutrição e desenvolvimento sustentável', International Food Policy Research Institute, Washington, DC, 2015