(1)
Elias, A. C. G. P.; Matsuo, T.; Grion, C. M. C.; Cardoso, L. T. Q.; Verri, P. H. POSSUM Scoring System for Predicting Mortality in Surgical Patients. Rev. Esc. Enferm. USP 2009, 43 (1), 23-29. https://doi.org/10.1590/S0080-62342009000100003.