Gulzar JS, Paruthy SB, Arya SV. Improving outcome in perforated peptic ulcer emergency surgery by Boey scoring. Int Surg J [Internet]. 2016 Dec. 10 [cited 2025 Oct. 13];3(4):2120-8. Available from: https://www.ijsurgery.com/index.php/isj/article/view/163