Vatnala, V., N. S. Gatla, P. K. Hota, R. B., V. L. P., and P. V. “A Prospective Study of P-POSSUM Score in Predicting Morbidity and Mortality in Patients Undergoing Gastrointestinal Surgeries”. International Surgery Journal, vol. 13, no. 5, Apr. 2026, pp. 782-6, doi:10.18203/2349-2902.isj20261171.