@article{escidoc:1034,
  title = {{Spectral distribution of activation energies in YBa2Cu3O7-$\delta$ thin films}},
  journal = {{Physical Review B}},
  volume = {62},
  pages = {15226--15229},
  year = {2000},
  author = {Warthmann, R. and Albrecht, J. and Kronm\"uller, H. and Joos, C.}
}