Ospina Díaz, J. M. (2014) “Pulse oximetry in six minutes walking test as a predictor of functional respiratory alteration in workers at artisanal coal mining”, Universidad y Salud. San Juan de Pasto, CO, 16(2), pp. 167–176. Available at: https://revistas2.udenar.edu.co/index.php/usalud/article/view/2383 (Accessed: 15 April 2026).