F. M. . Pesantez García, W. E. . Cisneros Basurto, X. M. . Chapaca Tituaña, and A. H. . Maldonado Beltrán, “Impact of COVID-19 on mathematical learning in 9- to 11-year-olds”, Health Leadership and Quality of Life, vol. 3, p. .364, Dec. 2024, doi: 10.56294/hl2024.364.