Mederos, O. B. ., Negrón, C. ., Sánchez, J. L. ., & Sigarreta, J. M. . (2022). Classifications and construction of the concept of punctual discontinuity: Clasificaciones y construcción del concepto de discontinuidad puntual. Mathematics, Education and Internet Journal, 21(1). https://doi.org/10.18845/rdmei.v21i1.5344 (Original work published August 3, 2020)