RAMÍREZ AMAYA , A.; SÁNCHEZ LARA, G. Descriptive Study of the Low Level of Performance in the Results of Plan 2015, (Mathematics, 6th Grade of Primary School) State of Veracruz. Universita Ciencia, [S. l.], v. 5, p. 15–23, 2016. DOI: 10.5281/zenodo.8284159. Disponível em: https://universita.ux.edu.mx/universita-ciencia/article/view/1148. Acesso em: 14 nov. 2026.