Morales, A., Marmolejo Vega, E., Locia Espinoza, E., López González, A. and Damián Mojica, A. 2019. A Teaching-learning about optimization problems: a close up through the use of GeoGebra software. INTERNATIONAL JOURNAL OF RESEARCH IN EDUCATION METHODOLOGY. 10, (Feb. 2019), 3368–3376. DOI:https://doi.org/10.24297/ijrem.v10i0.8090.