Quinde Chalén, Daniel Fabricio, Katherine Lisbeth Alcívar Pazmiño, and Maritza Catherine Vallejo Palacios. 2025. “Mathematical Development in Early Childhood: Challenges in Urban-Marginal Contexts of Guayaquil”. Espirales Revista Multidisciplinaria De investigación 9 (54):69-81. https://doi.org/10.31876/er.v9i54.892.