1. Arriaga PJ d (1968 [1620]) The Extirpation of Idolatry in Peru (trans: Keating LC). University of Kentucky Press, Lexington
2. Baer G (1992) Matsigenka shamanism: the one intoxicated by tobacco. In: Matteson Langdon EJ, Baer G (eds) Portals of power. University of New Mexico, Albuquerque, pp 79–102
3. Barrantes Cartín C (2009) El último cacique: Talamanca, Siglo XIX. Editorial Universidad Estatal a Distancia (EUNED), San José
4. Barrantes R, Smouse PE, Mohrenweiser H, Gershowitz H, Azofeifa J, Arias T, Neel J (1990) Microevolution in lower Central America: genetic characterization of the Chibcha-speaking groups of Costa Rica and Panama, and a consensus taxonomy based on genetic and linguistic affinity. Am J Hum Genet 46(1):63
5. Blessing A (1921–1922) Apuntes sobre los indios Bribris de Costa Rica. Revista de Costa Rica 3 (4–5):99–101