Pongsukwetchakul, T., and N. Chiannilkulchai. “Development the Clip Lock for Strap Sterile Operating Microscope Drape and Evaluation of Its Effectiveness”. Ramathibodi Nursing Journal, vol. 24, no. 2, Oct. 2018, pp. 163-77, https://he02.tci-thaijo.org/index.php/RNJ/article/view/149003.