Gutiérrez, Silguian Y., and Napoleón Rojas. “Expressions of Calculus in the Miskitu Culture of Sandy Bay Sirpi Community, South Atlantic Autonomous Region”. Ciencia E Interculturalidad, vol. 12, no. 1, Nov. 2013, pp. 8-20, doi:10.5377/rci.v12i1.1213.