A.V. Bondarenko, A.A. Zavgorodniy, D.A. Lotnik, M.A. Obolenskii, R.V. Vovk, and Y. Biletskiy, Creep and depinning of vortices in nontwinned YBa₂Cu₃O_6.87 single crystal, Low Temp. Phys. 34, (2008) [Fiz. Nizk. Temp. 34, 645-652, (2008)] DOI: https://doi.org/10.1063/1.2957002.