Comment on "Friction between a viscoelastic body and a rigid surface with random self-affine roughness".
A Comment on the Letter by Q. Li, M. Popov, A. Dimaki, A. E. Filippov, S. Kürschner, and V. L. Popov, Phys. Rev. Lett. 111, 034301 (2013). The authors of the Letter offer a Reply.
PGI-1, FZ-Jülich, 52425 Jülich, Germany and Sumy State University, Rimskii-Korsakov Street 2, 40007 Sumy, Ukraine.
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