Sánchez, Juan Carlos, and Carmen Valdivè. 2019. “Proximities When Actuating Epistemic-Cognitive Mathematics. Prelude That Springs from Testimonies of Novice and Expert Mathematicians. An Exploratory Study”. Gestión Y Gerencia 12 (2):50-86. https://revistas.uclave.org/index.php/gyg/article/view/2011.