David Levinson (1996). «Fulani». Encyclopedia of World Cultures: Africa and the Middle East, Volume 9. [S.l.]: Gale Group. ISBN978-0-8161-1808-3, citação: "The Fulani form the largest pastoral nomadic group in the world. The Bororo'en are noted for the size of their cattle herds. In addition to fully nomadic groups, however, there are also semisedentary Fulani —Fulbe Laddi— who also farm, although they argue that they do so out of necessity, not choice."
