Martínez Reyes, Magally, Anabelem Soberanes Martín, and Juan Manuel Sánchez Soto. “The Importance of Variation in the Concept of Function: A Case of Exploration through the Use of Technology”. Programación Matemática y Software 10, no. 2 (June 30, 2018): 63–70. Accessed May 17, 2024. https://progmat.uaem.mx/progmat/index.php/progmat/article/view/2018-10-2-07.