X-ray scattering evidence for macroscopic strong pinning centers in the sliding CDW state of D. Rideau, P. Monceau, R. Currat, H. Requardt, F. Nad, J. E. Lorenzo, S. Brazovskii, C. Detlefs and G. GrübelEurophys. Lett., 57 3 (2002) 471DOI: https://doi.org/10.1209/epl/i2002-00484-4