Gómez López, Luis Francisco. «The Concept of Elasticity and Strategies for Teaching It in Introductory Courses of Economics». Semestre Económico 22, no. 51 (abril 1, 2019): 149-167. Accedido julio 6, 2020. https://revistas.udem.edu.co/index.php/economico/article/view/2961.