Sánchez, Juan Carlos, and Carmen Valdivè. “Proximities When Actuating Epistemic-Cognitive Mathematics. Prelude That Springs from Testimonies of Novice and Expert Mathematicians. An Exploratory Study”. Gestión Y Gerencia, vol. 12, no. 2, Jan. 2019, pp. 50-86, https://mail.revistas.uclave.org/index.php/gyg/article/view/2011.