Yasmin, Rubiya, and Hyunkyu Kweon. “A Comparison of Nanotribological Characteristics Between Synthetic Fiber and Human Hair”. International Journal of Integrated Engineering 12, no. 3 (February 3, 2020): 216-224. Accessed June 18, 2021. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/5378.