Mejías, Cristian, and Ángel Alsina. “Historical-Epistemological Development of Algebra: Its Evolution Toward Different Meanings: Desarrollo histórico-epistemológico Del álgebra: Evolución Hacia Distintos Significados”. Mathematics, Education and Internet Journal, vol. 21, no. 2, Feb. 2021, doi:10.18845/rdmei.v21i2.5607.