L. M. Schifelbain, S. R. R. Vieira, J. S. Brauner, D. M. Pacheco, and A. A. Naujorks, “ Echocardiographic evaluation during weaning from mechanical ventilation ”, Clinics, vol. 66, no. 1, pp. 107–111, Jan. 2011, doi: 10.1590/S1807-59322011000100019.