Pongsukwetchakul, Tamakorn, and Natthacha Chiannilkulchai. 2018. “Development the Clip Lock for Strap Sterile Operating Microscope Drape and Evaluation of Its Effectiveness”. Ramathibodi Nursing Journal 24 (2):163-77. https://he02.tci-thaijo.org/index.php/RNJ/article/view/149003.