Charoenchoketavee, Chaiwan. 2011. “Outcomes of Two Burr Holes with Subpericranium Closed-system Drainage of Non-acute Subdural Hematoma”. Vajira Medical Journal : Journal of Urban Medicine 45 (2):93-105. https://he02.tci-thaijo.org/index.php/VMED/article/view/146.