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Guo, Yuzheng, Liang Fang, Da-Meng Liu, Zhi-Min Liao, Jian-Bin Luo, and Shi-Zhu Wen. "Thickness Dependent Friction On Few-layer MoS2, WS2, and WSe2." Nanotechnology 28, no. 24 (2017): 245703.

Guo, Yuzheng, et al. "Thickness Dependent Friction On Few-layer MoS2, WS2, and WSe2." Nanotechnology 28.24 (2017): 245703.