Intakhun, S. “Comparison efficiency centrifuge for coagulation testing between speed 4,000 rpm in 5 minutes and standard method”. Thammasat University Hospital Journal Online, vol. 4, no. 3, Dec. 2019, pp. 41-48, https://he02.tci-thaijo.org/index.php/TUHJ/article/view/240375.