Contributions to photodoping in oxygen-deficient YBa2Cu3Ox films C. Stockinger, W. Markowitsch, W. Lang, W. Kula and R. Sobolewski Eur. Phys. J. B, 2 3 (1998) 301-311 Published online: 15 April 1998 DOI: 10.1007/s100510050253