@article{escidoc:1028, title = {{Spectral distribution of activation energies in YBa2Cu3O7-$\delta$ thin films}}, author = {Warthmann, R. and Albrecht, J. and Kronm\"uller, H. and Joos, C.}, journal = {{Physical Review B}}, volume = {62}, pages = {15226--15229}, year = {2000}, doi = {} }