Abdulwally, A.M. et al. 2021. Surgical outcome of management of perforated peptic ulcer (Al-Gumhori General Hospital, Sana-Yemen, From January 2017 to January 2020). Journal of medical and pharmaceutical sciences. 5, 2 (Jun. 2021), 34–13. DOI:https://doi.org/10.26389/AJSRP.D291020.