1. Alanís, E. (1985).- Los rendimientos y la productividad en la agricultura. Revista de Geografía Agrícola, 160-173.
2. Asimov, I. (1989). Asimov´s chronology of science and discovery. New York: Harper Collins Publishers.
3. Bernal, A. (2016). Vicent Boix: “África es el supermercado del mundo”. Retrieved from http://www.publico.es/economia/vicent-boix-africa-supermercado-del.html.
4. Carroccio, A., Crescimanno, M., Galati, A. & Tulone, A. (2016). The land grabbing in the international scenario: the role of the EU in land grabbing. Agricultural and Food Economics, 4(12): 1-9. doi:doi 10.1186/s40100-016-0056-7.
5. Collier, P. & Dercor, S. (2015). African Agriculture In 50 Years: Smallholders In A Rapidly Changing World? (in)I F. E. (Ed.), FAO Expert Meeting on How to Feed the World in 2050 (p. 1-13). Rome, Italy: Food and Agriculture Organization of the United Nations.