Díaz Gómez, J.L. 2026. Heart Rate Recovery as a Context for Teaching the Exponential Function: A Didactical Design Based on the Theory of Objectification, Mathematical Modeling, and Covariational Reasoning. El cálculo y su enseñanza. 22, 1 (Jul. 2026), 50–76. DOI:https://doi.org/10.61174/recacym.v22i1.255.