Vílchez Quesada, Enrique, and Juan Félix Ávila Herrera. “Conceptual Learning Analysis Using CDFs: Documents in a Computable Format: Análisis De Aprendizaje Conceptual Empleando CDFs: Documentos Con Un Formato Computable”. Mathematics, Education and Internet Journal, vol. 22, no. 1, July 2021, doi:10.18845/rdmei.v22i1.5732.