PORTELA-GARCÍA, Cristina Andrea; VIDARTE-CLAROS, Armando. Levels of physical activity and time spending in front of screens in schoolchildren: differences in age and gender. Universidad y Salud, San Juan de Pasto, CO, v. 23, n. 3, p. 189–197, 2021. DOI: 10.22267/rus.212303.232. Disponível em: https://revistas2.udenar.edu.co/index.php/usalud/article/view/4474. Acesso em: 15 apr. 2026.