Segura, A., N. Carvajal, P. A. Chavarro, E. C. Wilches, and A. Carvajal. “Sensitivity and Specificity of the Yang Tobin Index to Predict Extubation Success in Critical Patients”. Colombia Medica, vol. 42, no. 4, Nov. 2011, pp. 458-67, doi:10.25100/cm.v42i4.946.