Goulart, A., & 		Martins, S.
(2013).
 Assessment of surgical risk in colo-rectal cancer patients: POSSUM or ACPGBI?.
<em>Revista Portuguesa De Cirurgia, </em>(24), 19-28.
Retrieved from <a href="https://revista.spcir.com/index.php/spcir/article/view/4" target="_new">https://revista.spcir.com/index.php/spcir/article/view/4</a>