Montero Vargas, L. J., MontaƱa, D. E., & Valencia Canastero, C. F. (2020). Usefulness of pulsed Doppler in the ultrasound diagnosis of occult pneumothorax: A case report. Universitas Medica, 61(4). https://doi.org/10.11144/Javeriana.umed61-4.dopp