Narongchaikul S. “Re-Operation to Stop Bleeding After Cardiac Surgery: Mortality, Source of Bleeding, Outcomes and Effects of Time to Delay Re-Operation”. Journal of The Department of Medical Services, vol. 45, no. 2, Sept. 2020, pp. 56-65, https://he02.tci-thaijo.org/index.php/JDMS/article/view/245342.