Gómez-Henao, P. A., and J. A. Carreño-Dueñas. “Cardiovascular Pre-Anesthesia Evaluation in Oncological Surgery”. Colombian Journal of Anesthesiology, Vol. 44, no. 1, Jan. 2016, pp. 17-22, https://www.revcolanest.com.co/index.php/rca/article/view/62.