Ye.S. Avotina, Yu.A. Kolesnichenko, S.B. Roobol, and J.M. van Ruitenbeek, Conductance of a tunnel point contact of noble metals in the presence of a single defect: Электpонные свойства металлов и сплавов, Low Temp. Phys. 34, (2008) [Fiz. Nizk. Temp. 34, 268-272, (2008)] DOI: https://doi.org/10.1063/1.2889410.