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