“An Ethnomathematics Exercise for Analyzing a Khipu Sample from Pachacamac (Perú)”. Revista Latinoamericana de Etnomatemática Perspectivas Socioculturales de la Educación Matemática 5, no. 1 (February 1, 2012): 62–88. Accessed January 15, 2026. https://revista.etnomatematica.org/index.php/RevLatEm/article/view/37.