^Jeffery Bentley, Weeds and Farmer Decision-Making in Cochabamba, Report of an Anthropological Study with the PROMASSEL Project, January 10—February 4, 2000, Cochabamba, Bolivia, p. 10
^Clodoaldo Soto Ruiz, Runasimi-Kastillanu-Inlis Llamkaymanaq Qullqa, Ayakuchu-Chanka, I rakta, Quechua-Spanish-English Functional Dictionary, Ayacucho-Chanka, Vol I
^escale.minedu.gob.pe - UGEL map of the Grau Province (Apurimac Region)